diff --git a/Greenshot/Drawing/SpeechbubbleContainer.cs b/Greenshot/Drawing/SpeechbubbleContainer.cs
index d157d1eee..197c93223 100644
--- a/Greenshot/Drawing/SpeechbubbleContainer.cs
+++ b/Greenshot/Drawing/SpeechbubbleContainer.cs
@@ -148,9 +148,10 @@ namespace Greenshot.Drawing {
 				state = graphics.Save();
 				// Draw bubble where the Tail is not visible.
 				using (Region clipRegion = new Region(tail)) {
-					Matrix transformMatrix = new Matrix();
-					transformMatrix.Rotate(tailAngle);
-					clipRegion.Transform(transformMatrix);
+					using (Matrix transformMatrix = new Matrix()) {
+						transformMatrix.Rotate(tailAngle);
+						clipRegion.Transform(transformMatrix);
+					}
 					clipRegion.Translate(rect.Left + (rect.Width / 2), rect.Top + (rect.Height / 2));
 					graphics.SetClip(clipRegion, CombineMode.Exclude);
 					graphics.TranslateTransform(rect.Left, rect.Top);
diff --git a/Greenshot/Drawing/Surface.cs b/Greenshot/Drawing/Surface.cs
index 338a918d1..b3f7c9fd2 100644
--- a/Greenshot/Drawing/Surface.cs
+++ b/Greenshot/Drawing/Surface.cs
@@ -879,6 +879,9 @@ namespace Greenshot.Drawing {
 					if (_surfaceSizeChanged != null && !imageRectangle.Equals(new Rectangle(Point.Empty, newImage.Size))) {
 						_surfaceSizeChanged(this, null);
 					}
+				} else {
+					// clean up matrix, as it hasn't been used in the undo stack.
+					matrix.Dispose();
 				}
 			} finally {
 				// Always close the background form
diff --git a/GreenshotPlugin/Core/ImageOutput.cs b/GreenshotPlugin/Core/ImageOutput.cs
index ba54b560d..d4a8deb14 100644
--- a/GreenshotPlugin/Core/ImageOutput.cs
+++ b/GreenshotPlugin/Core/ImageOutput.cs
@@ -303,7 +303,9 @@ namespace GreenshotPlugin.Core {
 			Image tmpImage;
 			if (outputSettings.Effects != null && outputSettings.Effects.Count > 0) {
 				// apply effects, if there are any
-				tmpImage = ImageHelper.ApplyEffects(imageToSave, outputSettings.Effects, new Matrix());
+				using (Matrix matrix = new Matrix()) {
+					tmpImage = ImageHelper.ApplyEffects(imageToSave, outputSettings.Effects, matrix);
+				}
 				if (tmpImage != null) {
 					if (disposeImage) {
 						imageToSave.Dispose();