diff --git a/Greenshot/Drawing/CursorContainer.cs b/Greenshot/Drawing/CursorContainer.cs
index d4a3ac63c..3d5c0fdb6 100644
--- a/Greenshot/Drawing/CursorContainer.cs
+++ b/Greenshot/Drawing/CursorContainer.cs
@@ -56,10 +56,6 @@ namespace Greenshot.Drawing {
 			get { return cursor; }
 		}
 
-		public override void Dispose() {
-			base.Dispose();
-		}
-
 		// The bulk of the clean-up code is implemented in Dispose(bool)
 
 		/**
diff --git a/Greenshot/Drawing/Filters/AbstractFilter.cs b/Greenshot/Drawing/Filters/AbstractFilter.cs
index ef47a50c0..f5c29c228 100644
--- a/Greenshot/Drawing/Filters/AbstractFilter.cs
+++ b/Greenshot/Drawing/Filters/AbstractFilter.cs
@@ -44,17 +44,23 @@ namespace Greenshot.Drawing.Filters {
 		
 		private bool invert = false;
 		public bool Invert {
-			get { return invert; }
-			set { invert=value; OnPropertyChanged("Invert"); }
+			get {
+				return invert;
+			}
+			set {
+				invert = value;
+				OnPropertyChanged("Invert");
+			}
 		}
-		[NonSerialized]
-		protected BitmapBuffer bbb;
 
-		protected Rectangle applyRect;
 		protected DrawableContainer parent;
 		public DrawableContainer Parent {
-			get {return parent;}
-			set {parent = value;}
+			get {
+				return parent;
+			}
+			set {
+				parent = value;
+			}
 		}
 		
 		public AbstractFilter(DrawableContainer parent) {
@@ -65,36 +71,12 @@ namespace Greenshot.Drawing.Filters {
 			return parent;
 		}
 
-		public virtual void Apply(Graphics graphics, Bitmap applyBitmap, Rectangle rect, RenderMode renderMode) {
-			applyRect = ImageHelper.CreateIntersectRectangle(applyBitmap.Size, rect, Invert);
-
-			if (applyRect.Width == 0 || applyRect.Height == 0) {
-				// nothing to do
-				return;
-			}
-
-			bbb = new BitmapBuffer(applyBitmap, applyRect);
-			try {
-				bbb.Lock();
-				for(int y=0;y<bbb.Height; y++) {
-					for(int x=0;x<bbb.Width; x++) {
-						if(parent.Contains(applyRect.Left+x, applyRect.Top+y) ^ Invert) {
-							IteratePixel(x, y);
-						} 
-					}
-				}
-			} finally {
-				bbb.DrawTo(graphics, applyRect.Location);
-				bbb.Dispose();
-				bbb = null;
-			}
-		}
-		
-		protected virtual void IteratePixel(int x, int y) {}
+		public abstract void Apply(Graphics graphics, Bitmap applyBitmap, Rectangle rect, RenderMode renderMode);
 		
 		protected void OnPropertyChanged(string propertyName) {
-			if(propertyChanged != null) propertyChanged(this, new PropertyChangedEventArgs(propertyName));
+			if (propertyChanged != null) {
+				propertyChanged(this, new PropertyChangedEventArgs(propertyName));
+			}
 		}
-		
 	}
 }
diff --git a/Greenshot/Drawing/Filters/BrightnessFilter.cs b/Greenshot/Drawing/Filters/BrightnessFilter.cs
index 12565115e..33355453a 100644
--- a/Greenshot/Drawing/Filters/BrightnessFilter.cs
+++ b/Greenshot/Drawing/Filters/BrightnessFilter.cs
@@ -22,31 +22,50 @@ using System;
 using System.Drawing;
 using Greenshot.Drawing.Fields;
 using Greenshot.Plugin.Drawing;
+using GreenshotPlugin.Core;
 
 namespace Greenshot.Drawing.Filters {
 	[Serializable()] 
 	public class BrightnessFilter : AbstractFilter {
 		
-		private double brightness;
-		
 		public BrightnessFilter(DrawableContainer parent) : base(parent) {
 			AddField(GetType(), FieldType.BRIGHTNESS, 0.9d);
 		}
-		
-		protected override void IteratePixel(int x, int y) {
-			Color color = bbb.GetColorAt(x, y);
-			int r = Convert.ToInt16(color.R*brightness);
-			int g = Convert.ToInt16(color.G*brightness);
-			int b = Convert.ToInt16(color.B*brightness);
-			r = (r>255) ? 255 : r;
-			g = (g>255) ? 255 : g;
-			b = (b>255) ? 255 : b;
-			bbb.SetColorAt(x, y, Color.FromArgb(color.A, r, g, b));
-		}
-		
-		public override void Apply(Graphics graphics, Bitmap bmp, Rectangle rect, RenderMode renderMode) {
-			brightness = GetFieldValueAsDouble(FieldType.BRIGHTNESS);
-			base.Apply(graphics, bmp, rect, renderMode);
+
+		/// <summary>
+		/// Implements the Apply code for the Brightness Filet
+		/// </summary>
+		/// <param name="graphics"></param>
+		/// <param name="applyBitmap"></param>
+		/// <param name="rect"></param>
+		/// <param name="renderMode"></param>
+		public override void Apply(Graphics graphics, Bitmap applyBitmap, Rectangle rect, RenderMode renderMode) {
+			Rectangle applyRect = ImageHelper.CreateIntersectRectangle(applyBitmap.Size, rect, Invert);
+
+			if (applyRect.Width == 0 || applyRect.Height == 0) {
+				// nothing to do
+				return;
+			}
+
+			using (BitmapBuffer bbb = new BitmapBuffer(applyBitmap, applyRect)) {
+				bbb.Lock();
+				double brightness = GetFieldValueAsDouble(FieldType.BRIGHTNESS);
+				for (int y = 0; y < bbb.Height; y++) {
+					for (int x = 0; x < bbb.Width; x++) {
+						if (parent.Contains(applyRect.Left + x, applyRect.Top + y) ^ Invert) {
+							Color color = bbb.GetColorAt(x, y);
+							int r = Convert.ToInt16(color.R * brightness);
+							int g = Convert.ToInt16(color.G * brightness);
+							int b = Convert.ToInt16(color.B * brightness);
+							r = (r > 255) ? 255 : r;
+							g = (g > 255) ? 255 : g;
+							b = (b > 255) ? 255 : b;
+							bbb.SetColorAt(x, y, Color.FromArgb(color.A, r, g, b));
+						}
+					}
+				}
+				bbb.DrawTo(graphics, applyRect.Location);
+			}
 		}
 	}
 }
diff --git a/Greenshot/Drawing/Filters/GrayscaleFilter.cs b/Greenshot/Drawing/Filters/GrayscaleFilter.cs
index 09b961494..33ebd90d4 100644
--- a/Greenshot/Drawing/Filters/GrayscaleFilter.cs
+++ b/Greenshot/Drawing/Filters/GrayscaleFilter.cs
@@ -20,6 +20,8 @@
  */
 using System;
 using System.Drawing;
+using GreenshotPlugin.Core;
+using Greenshot.Plugin.Drawing;
 
 namespace Greenshot.Drawing.Filters {
 	/// <summary>
@@ -29,12 +31,29 @@ namespace Greenshot.Drawing.Filters {
 	public class GrayscaleFilter : AbstractFilter {
 		public GrayscaleFilter(DrawableContainer parent) : base(parent) {
 		}
-		
-		protected override void IteratePixel(int x, int y) {
-			Color color = bbb.GetColorAt(x, y);
-			int luma  = (int)((0.3*color.R) + (0.59*color.G) + (0.11*color.B));
-			color = Color.FromArgb(luma, luma, luma);
-			bbb.SetColorAt(x, y, color);
+
+		public override void Apply(Graphics graphics, Bitmap applyBitmap, Rectangle rect, RenderMode renderMode) {
+			Rectangle applyRect = ImageHelper.CreateIntersectRectangle(applyBitmap.Size, rect, Invert);
+
+			if (applyRect.Width == 0 || applyRect.Height == 0) {
+				// nothing to do
+				return;
+			}
+
+			using (BitmapBuffer bbb = new BitmapBuffer(applyBitmap, applyRect)) {
+				bbb.Lock();
+				for (int y = 0; y < bbb.Height; y++) {
+					for (int x = 0; x < bbb.Width; x++) {
+						if (parent.Contains(applyRect.Left + x, applyRect.Top + y) ^ Invert) {
+							Color color = bbb.GetColorAt(x, y);
+							int luma = (int)((0.3 * color.R) + (0.59 * color.G) + (0.11 * color.B));
+							color = Color.FromArgb(luma, luma, luma);
+							bbb.SetColorAt(x, y, color);
+						}
+					}
+				}
+				bbb.DrawTo(graphics, applyRect.Location);
+			}
 		}
 	}
 }
diff --git a/Greenshot/Drawing/Filters/HighlightFilter.cs b/Greenshot/Drawing/Filters/HighlightFilter.cs
index 9e51a7e27..9ff893dcc 100644
--- a/Greenshot/Drawing/Filters/HighlightFilter.cs
+++ b/Greenshot/Drawing/Filters/HighlightFilter.cs
@@ -22,26 +22,44 @@ using System;
 using System.Drawing;
 using Greenshot.Drawing.Fields;
 using Greenshot.Plugin.Drawing;
+using GreenshotPlugin.Core;
 
 namespace Greenshot.Drawing.Filters {
 	[Serializable()] 
 	public class HighlightFilter : AbstractFilter {
-		[NonSerialized]
-		private Color highlightColor;
-		
 		public HighlightFilter(DrawableContainer parent) : base(parent) {
 			AddField(GetType(), FieldType.FILL_COLOR, Color.Yellow);
 		}
-		
-		protected override void IteratePixel(int x, int y) {
-			Color color = bbb.GetColorAt(x, y);
-			color = Color.FromArgb(color.A, Math.Min(highlightColor.R,color.R), Math.Min(highlightColor.G,color.G), Math.Min(highlightColor.B,color.B));
-			bbb.SetColorAt(x, y, color);
-		}
 
-		public override void Apply(Graphics graphics, Bitmap bmp, Rectangle rect, RenderMode renderMode) {
-			highlightColor = GetFieldValueAsColor(FieldType.FILL_COLOR);
-			base.Apply(graphics, bmp, rect, renderMode);
+		/// <summary>
+		/// Implements the Apply code for the Brightness Filet
+		/// </summary>
+		/// <param name="graphics"></param>
+		/// <param name="applyBitmap"></param>
+		/// <param name="rect"></param>
+		/// <param name="renderMode"></param>
+		public override void Apply(Graphics graphics, Bitmap applyBitmap, Rectangle rect, RenderMode renderMode) {
+			Rectangle applyRect = ImageHelper.CreateIntersectRectangle(applyBitmap.Size, rect, Invert);
+
+			if (applyRect.Width == 0 || applyRect.Height == 0) {
+				// nothing to do
+				return;
+			}
+
+			using (BitmapBuffer bbb = new BitmapBuffer(applyBitmap, applyRect)) {
+				bbb.Lock();
+				Color highlightColor = GetFieldValueAsColor(FieldType.FILL_COLOR);
+				for (int y = 0; y < bbb.Height; y++) {
+					for (int x = 0; x < bbb.Width; x++) {
+						if (parent.Contains(applyRect.Left + x, applyRect.Top + y) ^ Invert) {
+							Color color = bbb.GetColorAt(x, y);
+							color = Color.FromArgb(color.A, Math.Min(highlightColor.R, color.R), Math.Min(highlightColor.G, color.G), Math.Min(highlightColor.B, color.B));
+							bbb.SetColorAt(x, y, color);
+						}
+					}
+				}
+				bbb.DrawTo(graphics, applyRect.Location);
+			}
 		}
 	}
 }
diff --git a/Greenshot/Drawing/Filters/MagnifierFilter.cs b/Greenshot/Drawing/Filters/MagnifierFilter.cs
index 72d7cca1f..16a09d207 100644
--- a/Greenshot/Drawing/Filters/MagnifierFilter.cs
+++ b/Greenshot/Drawing/Filters/MagnifierFilter.cs
@@ -27,34 +27,37 @@ using GreenshotPlugin.Core;
 namespace Greenshot.Drawing.Filters {
 	[Serializable] 
 	public class MagnifierFilter : AbstractFilter {
-		
-		[NonSerialized]
-		private BitmapBuffer bbbSrc;
-		private int magnificationFactor;
-				
 		public MagnifierFilter(DrawableContainer parent) : base(parent) {
 			AddField(GetType(), FieldType.MAGNIFICATION_FACTOR, 2);
 		}
-		
-		public override void Apply(Graphics graphics, Bitmap applyBitmap, Rectangle rect, RenderMode renderMode) {
-			magnificationFactor = GetFieldValueAsInt(FieldType.MAGNIFICATION_FACTOR);
-			applyRect = ImageHelper.CreateIntersectRectangle(applyBitmap.Size, rect, Invert);
 
-			using (bbbSrc = new BitmapBuffer(applyBitmap, applyRect)) {
-				bbbSrc.Lock();
-				base.Apply(graphics, applyBitmap, applyRect, renderMode);
+		public override void Apply(Graphics graphics, Bitmap applyBitmap, Rectangle rect, RenderMode renderMode) {
+			Rectangle applyRect = ImageHelper.CreateIntersectRectangle(applyBitmap.Size, rect, Invert);
+
+			if (applyRect.Width == 0 || applyRect.Height == 0) {
+				// nothing to do
+				return;
+			}
+			int magnificationFactor = GetFieldValueAsInt(FieldType.MAGNIFICATION_FACTOR);
+
+			using (BitmapBuffer bbb = new BitmapBuffer(applyBitmap, applyRect)) {
+				int halfWidth = bbb.Size.Width / 2;
+				int halfHeight = bbb.Size.Height / 2;
+				bbb.Lock();
+				using (BitmapBuffer bbbSrc = new BitmapBuffer(applyBitmap, applyRect)) {
+					for (int y = 0; y < bbb.Height; y++) {
+						int yDistanceFromCenter = halfHeight - y;
+						for (int x = 0; x < bbb.Width; x++) {
+							int xDistanceFromCenter = halfWidth - x;
+							if (parent.Contains(applyRect.Left + x, applyRect.Top + y) ^ Invert) {
+								Color color = bbbSrc.GetColorAt(halfWidth - xDistanceFromCenter / magnificationFactor, halfHeight - yDistanceFromCenter / magnificationFactor);
+								bbb.SetColorAt(x, y, color);
+							}
+						}
+					}
+				}
+				bbb.DrawTo(graphics, applyRect.Location);
 			}
-			bbbSrc = null;
-		}
-		
-		protected override void IteratePixel(int x, int y) {
-			int halfWidth = bbb.Size.Width/2;
-			int halfHeight = bbb.Size.Height/2;
-			int yDistanceFromCenter = halfHeight-y;
-			int xDistanceFromCenter = halfWidth-x;
-			Color color = bbbSrc.GetColorAt(halfWidth-xDistanceFromCenter/magnificationFactor,halfHeight-yDistanceFromCenter/magnificationFactor);
-			bbb.SetColorAt(x, y, color);
 		}
 	}
-	
 }
diff --git a/Greenshot/Drawing/Filters/PixelizationFilter.cs b/Greenshot/Drawing/Filters/PixelizationFilter.cs
index f316ef98c..daf68e587 100644
--- a/Greenshot/Drawing/Filters/PixelizationFilter.cs
+++ b/Greenshot/Drawing/Filters/PixelizationFilter.cs
@@ -35,35 +35,40 @@ namespace Greenshot.Drawing.Filters {
 			AddField(GetType(), FieldType.PIXEL_SIZE, 5);
 		}
 		
-		public static void Apply(Graphics graphics, Bitmap applyBitmap, Rectangle rect, int pixelSize) {
-
-			if(pixelSize <= 1 || rect.Width == 0 || rect.Height == 0) {
+		public override void Apply(Graphics graphics, Bitmap applyBitmap, Rectangle rect, RenderMode renderMode) {
+			int pixelSize = GetFieldValueAsInt(FieldType.PIXEL_SIZE);
+			Rectangle applyRect = ImageHelper.CreateIntersectRectangle(applyBitmap.Size, rect, Invert);
+			if (pixelSize <= 1 || rect.Width == 0 || rect.Height == 0) {
 				// Nothing to do
 				return;
 			}
-			if(rect.Width < pixelSize) pixelSize = rect.Width;
-			if(rect.Height < pixelSize) pixelSize = rect.Height;
-		
+			if (rect.Width < pixelSize) {
+				pixelSize = rect.Width;
+			}
+			if (rect.Height < pixelSize) {
+				pixelSize = rect.Height;
+			}
+
 			using (BitmapBuffer bbbDest = new BitmapBuffer(applyBitmap, rect)) {
 				bbbDest.Lock();
-				using(BitmapBuffer bbbSrc = new BitmapBuffer(applyBitmap, rect)) {
+				using (BitmapBuffer bbbSrc = new BitmapBuffer(applyBitmap, rect)) {
 					bbbSrc.Lock();
 					List<Color> colors = new List<Color>();
-					int halbPixelSize = pixelSize/2;
-					for(int y=-halbPixelSize;y<bbbSrc.Height+halbPixelSize; y=y+pixelSize) {
-						for(int x=-halbPixelSize;x<=bbbSrc.Width+halbPixelSize; x=x+pixelSize) {
+					int halbPixelSize = pixelSize / 2;
+					for (int y = -halbPixelSize; y < bbbSrc.Height + halbPixelSize; y = y + pixelSize) {
+						for (int x = -halbPixelSize; x <= bbbSrc.Width + halbPixelSize; x = x + pixelSize) {
 							colors.Clear();
-							for(int yy=y;yy<y+pixelSize;yy++) {
-								if (yy >=0 && yy < bbbSrc.Height) {
-									for(int xx=x;xx<x+pixelSize;xx++) {
-										colors.Add(bbbSrc.GetColorAt(xx,yy));
+							for (int yy = y; yy < y + pixelSize; yy++) {
+								if (yy >= 0 && yy < bbbSrc.Height) {
+									for (int xx = x; xx < x + pixelSize; xx++) {
+										colors.Add(bbbSrc.GetColorAt(xx, yy));
 									}
 								}
 							}
 							Color currentAvgColor = Colors.Mix(colors);
-							for(int yy=y;yy<=y+pixelSize;yy++) {
-								if (yy >=0 && yy < bbbSrc.Height) {
-									for(int xx=x;xx<=x+pixelSize;xx++) {
+							for (int yy = y; yy <= y + pixelSize; yy++) {
+								if (yy >= 0 && yy < bbbSrc.Height) {
+									for (int xx = x; xx <= x + pixelSize; xx++) {
 										bbbDest.SetColorAt(xx, yy, currentAvgColor);
 									}
 								}
@@ -74,12 +79,5 @@ namespace Greenshot.Drawing.Filters {
 				bbbDest.DrawTo(graphics, rect.Location);
 			}
 		}
-		
-		public override void Apply(Graphics graphics, Bitmap applyBitmap, Rectangle rect, RenderMode renderMode) {
-			int pixelSize = GetFieldValueAsInt(FieldType.PIXEL_SIZE);
-			applyRect = ImageHelper.CreateIntersectRectangle(applyBitmap.Size, rect, Invert);
-
-			Apply(graphics, applyBitmap, applyRect, pixelSize);
-		}
 	}
 }
diff --git a/Greenshot/Drawing/Surface.cs b/Greenshot/Drawing/Surface.cs
index 25929fc02..4606cff75 100644
--- a/Greenshot/Drawing/Surface.cs
+++ b/Greenshot/Drawing/Surface.cs
@@ -434,16 +434,6 @@ namespace Greenshot.Drawing {
 			captureDetails = capture.CaptureDetails;
 		}
 
-		/// <summary>
-		/// The public accessible Dispose
-		/// Will call the GarbageCollector to SuppressFinalize, preventing being cleaned twice 		
-		/// </summary>
-		public new void Dispose() {
-			Dispose(true);
-			base.Dispose();
-			GC.SuppressFinalize(this);
-		}
-
 		protected override void Dispose(bool disposing) {
 			if (disposing) {
 				Count--;
@@ -464,6 +454,17 @@ namespace Greenshot.Drawing {
 				while (redoStack != null && redoStack.Count > 0) {
 					redoStack.Pop().Dispose();
 				}
+				foreach (IDrawableContainer container in elements) {
+					container.Dispose();
+				}
+				if (undrawnElement != null) {
+					undrawnElement.Dispose();
+					undrawnElement = null;
+				}
+				if (cropContainer != null) {
+					cropContainer.Dispose();
+					cropContainer = null;
+				}
 			}
 			base.Dispose(disposing);
 		}
@@ -909,7 +910,7 @@ namespace Greenshot.Drawing {
 					ex.Data.Add("Width", Image.Width);
 					ex.Data.Add("Height", Image.Height);
 					ex.Data.Add("Pixelformat", Image.PixelFormat);
-					throw ex;
+					throw;
 				}
 
 				Point offset = new Point(-cropRectangle.Left, -cropRectangle.Top);
diff --git a/Greenshot/Forms/AboutForm.cs b/Greenshot/Forms/AboutForm.cs
index aa3a40476..fe5f595da 100644
--- a/Greenshot/Forms/AboutForm.cs
+++ b/Greenshot/Forms/AboutForm.cs
@@ -132,7 +132,12 @@ namespace Greenshot {
 		/// </summary>
 		public AboutForm() {
 			// Make sure our resources are removed again.
-			this.Disposed += delegate { Cleanup(); };
+			this.Disposed += delegate {
+				Cleanup();
+			};
+			this.FormClosing += delegate {
+				Cleanup();
+			};
 
 			// Enable animation for this form, when we don't set this the timer doesn't start as soon as the form is loaded.
 			EnableAnimation = true;
@@ -228,6 +233,9 @@ namespace Greenshot {
 		/// Called from the AnimatingForm, for every frame
 		/// </summary>
 		protected override void Animate() {
+			if (gBitmap == null) {
+				return;
+			}
 			if (!isTerminalServerSession) {
 				// Color cycle
 				if (waitFrames != 0) {
diff --git a/Greenshot/Forms/CaptureForm.cs b/Greenshot/Forms/CaptureForm.cs
index 9f274b726..de17a3dc8 100644
--- a/Greenshot/Forms/CaptureForm.cs
+++ b/Greenshot/Forms/CaptureForm.cs
@@ -35,6 +35,7 @@ using GreenshotPlugin.UnmanagedHelpers;
 using GreenshotPlugin.Core;
 using Greenshot.IniFile;
 using GreenshotPlugin.Controls;
+using System.Security.Permissions;
 
 namespace Greenshot.Forms {
 	/// <summary>
@@ -106,6 +107,7 @@ namespace Greenshot.Forms {
 		/// This should prevent childs to draw backgrounds
 		/// </summary>
 		protected override CreateParams CreateParams {
+			[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]
 			get {
 				CreateParams cp = base.CreateParams;
 				cp.ExStyle |= 0x02000000;
diff --git a/Greenshot/Forms/ImageEditorForm.cs b/Greenshot/Forms/ImageEditorForm.cs
index e3f1ade4b..5cd7e9afc 100644
--- a/Greenshot/Forms/ImageEditorForm.cs
+++ b/Greenshot/Forms/ImageEditorForm.cs
@@ -657,7 +657,7 @@ namespace Greenshot {
 		}
 
 		void AboutToolStripMenuItemClick(object sender, System.EventArgs e) {
-			new AboutForm().ShowDialog(this);
+			MainForm.Instance.ShowAbout();
 		}
 
 		void PreferencesToolStripMenuItemClick(object sender, System.EventArgs e) {
diff --git a/Greenshot/Forms/MainForm.cs b/Greenshot/Forms/MainForm.cs
index 3a400ef05..63b6037e8 100644
--- a/Greenshot/Forms/MainForm.cs
+++ b/Greenshot/Forms/MainForm.cs
@@ -968,6 +968,10 @@ namespace Greenshot {
 		/// <param name="sender"></param>
 		/// <param name="e"></param>
 		void Contextmenu_aboutClick(object sender, EventArgs e) {
+			ShowAbout();
+		}
+
+		public void ShowAbout() {
 			if (aboutForm != null) {
 				WindowDetails.ToForeground(aboutForm.Handle);
 			} else {
diff --git a/Greenshot/Helpers/IECaptureHelper.cs b/Greenshot/Helpers/IECaptureHelper.cs
index f678bef9c..3173c6cc2 100644
--- a/Greenshot/Helpers/IECaptureHelper.cs
+++ b/Greenshot/Helpers/IECaptureHelper.cs
@@ -582,7 +582,9 @@ namespace Greenshot.Helpers {
 				if (element.attributes.ContainsKey("greenshot") && element.attributes["greenshot"] != null) {
 					string greenshotAction = element.attributes["greenshot"];
 					if ("hide".Equals(greenshotAction)) {
-						PixelizationFilter.Apply(graphicsTarget, returnBitmap, element.rectangle, 4);
+						using (Brush brush = new SolidBrush(Color.Black)) {
+							graphicsTarget.FillRectangle(brush, element.rectangle);
+						}
 					} else if ("red".Equals(greenshotAction)) {
 						using (Brush brush = new SolidBrush(Color.Red)) {
 							graphicsTarget.FillRectangle(brush, element.rectangle);
diff --git a/GreenshotPlugin/Core/WindowsHelper.cs b/GreenshotPlugin/Core/WindowsHelper.cs
index 8a07504d8..f0dd294bb 100644
--- a/GreenshotPlugin/Core/WindowsHelper.cs
+++ b/GreenshotPlugin/Core/WindowsHelper.cs
@@ -159,6 +159,7 @@ namespace GreenshotPlugin.Core  {
 	/// Provides details about a Window returned by the 
 	/// enumeration
 	/// </summary>
+	[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1049:TypesThatOwnNativeResourcesShouldBeDisposable")]
 	public class WindowDetails : IEquatable<WindowDetails>{
 		private const string METRO_WINDOWS_CLASS = "Windows.UI.Core.CoreWindow";
 		private const string METRO_APPLAUNCHER_CLASS = "ImmersiveLauncher";
diff --git a/GreenshotPlugin/UnmanagedHelpers/User32.cs b/GreenshotPlugin/UnmanagedHelpers/User32.cs
index ce1ef4b90..45ddf0ca7 100644
--- a/GreenshotPlugin/UnmanagedHelpers/User32.cs
+++ b/GreenshotPlugin/UnmanagedHelpers/User32.cs
@@ -69,7 +69,7 @@ namespace GreenshotPlugin.UnmanagedHelpers {
 		public static extern IntPtr GetWindow(IntPtr hWnd, GetWindowCommand uCmd);
 		[DllImport("user32", SetLastError = true)]
 		public static extern int ShowWindow(IntPtr hWnd, ShowWindowCommand nCmdShow);
-		[DllImport("user32", CharSet = CharSet.Auto, SetLastError = true)]
+		[DllImport("user32", CharSet = CharSet.Unicode, SetLastError = true)]
 		public extern static int GetWindowText(IntPtr hWnd, StringBuilder lpString, int cch);
 		[DllImport("user32", CharSet = CharSet.Auto, SetLastError = true)]
 		public extern static int GetWindowTextLength(IntPtr hWnd);
@@ -97,7 +97,7 @@ namespace GreenshotPlugin.UnmanagedHelpers {
 		[DllImport("user32", SetLastError = true)]
 		[return: MarshalAs(UnmanagedType.Bool)]
 		public extern static bool IsZoomed(IntPtr hwnd);
-		[DllImport("user32", CharSet = CharSet.Auto, SetLastError = true)]
+		[DllImport("user32", CharSet = CharSet.Unicode, SetLastError = true)]
 		public extern static int GetClassName (IntPtr hWnd, StringBuilder lpClassName, int nMaxCount);
 		[DllImport("user32", SetLastError = true)]
 		public static extern IntPtr GetClassLong(IntPtr hWnd, int nIndex);