diff --git a/debian/changelog b/debian/changelog
index 2d55e461..79293358 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -2,6 +2,9 @@ byobu (2.75) UNRELEASED; urgency=low
 
   * usr/bin/byobu: ensure that .screenrc gets sourced if byobu is run
     with arguments, LP: #580760
+  * ec2_cost, ip_address, network, rcs_cost: fix bug when calling ifconfig
+    without setting lang to english, LP: #578792
+
 
  -- Dustin Kirkland <kirkland@ubuntu.com>  Sat, 15 May 2010 15:32:30 -0400
 
diff --git a/usr/lib/byobu/ec2_cost b/usr/lib/byobu/ec2_cost
index 3115b7bc..bc77aa65 100755
--- a/usr/lib/byobu/ec2_cost
+++ b/usr/lib/byobu/ec2_cost
@@ -63,7 +63,7 @@ TX_RATE="0.15"
 # Auto detect network interface
 IF=`tail -n1 /proc/net/route  | awk '{print $1}'`
 
-ifconfig_out=`/sbin/ifconfig "$IF"`
+ifconfig_out=`LC_ALL=C /sbin/ifconfig "$IF"`
 
 # Calculate bandwidth cost
 tx_gb=`echo "$ifconfig_out" | grep "TX bytes:" | sed "s/^.*TX bytes://" | awk '{ printf "%f", $1 / 1024 / 1024 / 1024 }'`
diff --git a/usr/lib/byobu/ip_address b/usr/lib/byobu/ip_address
index 437fd827..95586038 100755
--- a/usr/lib/byobu/ip_address
+++ b/usr/lib/byobu/ip_address
@@ -21,7 +21,7 @@ PKG="byobu"
 color 2>/dev/null || color() { true; }
 
 if [ "$1" = "--detail" ]; then
-	/sbin/ifconfig | grep "inet addr" | sed -e 's/^\s*//' -e 's/\s*$//'
+	LC_ALL=C /sbin/ifconfig | grep "inet addr" | sed -e 's/^\s*//' -e 's/\s*$//'
 	exit 0
 fi
 
@@ -36,6 +36,6 @@ else
 	interface=`tail -n1 /proc/net/route  | awk '{print $1}'`
 fi
 
-ipaddr=`/sbin/ifconfig "$interface" | grep "inet addr:" | sed -e "s/^.*inet addr://" -e "s/ .*$//"`
+ipaddr=`LC_ALL=C /sbin/ifconfig "$interface" | grep "inet addr:" | sed -e "s/^.*inet addr://" -e "s/ .*$//"`
 
 printf "%s$(color bold2)%s$(color -)" "$space" "$ipaddr"
diff --git a/usr/lib/byobu/network b/usr/lib/byobu/network
index cf378a1a..60f147d8 100755
--- a/usr/lib/byobu/network
+++ b/usr/lib/byobu/network
@@ -28,7 +28,7 @@ else
 fi
 
 if [ "$1" = "--detail" ]; then
-	/sbin/ifconfig "$interface" | sed 's/\s*$//'
+	LC_ALL=C /sbin/ifconfig "$interface" | sed 's/\s*$//'
 	exit 0
 fi
 
diff --git a/usr/lib/byobu/rcs_cost b/usr/lib/byobu/rcs_cost
index e2ff11f1..219ec5b7 100755
--- a/usr/lib/byobu/rcs_cost
+++ b/usr/lib/byobu/rcs_cost
@@ -66,7 +66,7 @@ TX_RATE="0.22"
 # Auto detect network interface
 IF=`tail -n1 /proc/net/route  | awk '{print $1}'`
 
-ifconfig_out=`/sbin/ifconfig "$IF"`
+ifconfig_out=`LC_ALL=C /sbin/ifconfig "$IF"`
 
 # Calculate bandwidth cost
 tx_gb=`echo "$ifconfig_out" | grep "TX bytes:" | sed "s/^.*TX bytes://" | awk '{ printf "%f", $1 / 1024 / 1024 / 1024 }'`