diff -Nru live-build-3.0~a57/debian/changelog live-build-3.0~a57/debian/changelog
--- live-build-3.0~a57/debian/changelog	2012-08-24 07:42:57.000000000 +0000
+++ live-build-3.0~a57/debian/changelog	2012-08-24 21:06:12.000000000 +0000
@@ -1,3 +1,9 @@
+live-build (3.0~a57-1ubuntu4) quantal; urgency=low
+
+  * Don't turn on xz compression in mksquashfs for ubuntu builds.
+
+ -- Adam Conrad <adconrad@ubuntu.com>  Fri, 24 Aug 2012 15:05:30 -0600
+
 live-build (3.0~a57-1ubuntu3) quantal; urgency=low
 
   * Fix execution of binary hooks.
diff -Nru live-build-3.0~a57/debian/patches/series live-build-3.0~a57/debian/patches/series
--- live-build-3.0~a57/debian/patches/series	2012-08-24 07:41:38.000000000 +0000
+++ live-build-3.0~a57/debian/patches/series	2012-08-24 21:06:50.000000000 +0000
@@ -13,3 +13,4 @@
 ubuntu-parent-mirror-binary-volatile.patch
 ubuntu-debootstrap-variants.patch
 ubuntu-fix-binary-hooks.patch
+ubuntu-no-xz-squashfs.patch
diff -Nru live-build-3.0~a57/debian/patches/ubuntu-no-xz-squashfs.patch live-build-3.0~a57/debian/patches/ubuntu-no-xz-squashfs.patch
--- live-build-3.0~a57/debian/patches/ubuntu-no-xz-squashfs.patch	1970-01-01 00:00:00.000000000 +0000
+++ live-build-3.0~a57/debian/patches/ubuntu-no-xz-squashfs.patch	2012-08-24 21:07:40.000000000 +0000
@@ -0,0 +1,25 @@
+Description: Don't turn on xz compression in mksquashfs for ubuntu builds.
+Author: Adam Conrad <adconrad@ubuntu.com>
+Forwarded: no
+Last-Update: 2012-08-24
+
+--- live-build-3.0~a57.orig/scripts/build/lb_binary_rootfs
++++ live-build-3.0~a57/scripts/build/lb_binary_rootfs
+@@ -363,8 +363,15 @@ case "${LB_CHROOT_FILESYSTEM}" in
+ 				;;
+ 
+ 			*)
+-				# FIXME: artax-backports too, once d-i has catched up
+-				MKSQUASHFS_OPTIONS="${MKSQUASHFS_OPTIONS} -comp xz"
++				case "${LB_MODE}" in
++					ubuntu|kubuntu)
++
++						;;
++					*)
++						# FIXME: artax-backports too, once d-i has catched up
++						MKSQUASHFS_OPTIONS="${MKSQUASHFS_OPTIONS} -comp xz"
++						;;
++				esac
+ 				;;
+ 		esac
+