diff -Nru gtk+3.0-3.4.2/debian/changelog gtk+3.0-3.4.2/debian/changelog
--- gtk+3.0-3.4.2/debian/changelog	2012-07-03 19:03:14.000000000 +0100
+++ gtk+3.0-3.4.2/debian/changelog	2012-07-27 23:08:30.000000000 +0100
@@ -1,3 +1,11 @@
+gtk+3.0 (3.4.2-0ubuntu0.5~ppa~tj) precise; urgency=low
+
+  * debian/patches/102_do_not_duplicate_cups_custom_prefix.patch:
+    - Fix failure to print custom page sizes - do not duplicate CUPS "Custom."
+      prefix (lp: #998156)
+
+ -- TJ <ubuntu@iam.tj>  Fri, 27 Jul 2012 19:41:21 +0100
+
 gtk+3.0 (3.4.2-0ubuntu0.4) precise-proposed; urgency=low
 
   * debian/patches/git_gtkstatusicon_segfault.patch:
diff -Nru gtk+3.0-3.4.2/debian/patches/102_do_not_duplicate_cups_custom_prefix.patch gtk+3.0-3.4.2/debian/patches/102_do_not_duplicate_cups_custom_prefix.patch
--- gtk+3.0-3.4.2/debian/patches/102_do_not_duplicate_cups_custom_prefix.patch	1970-01-01 01:00:00.000000000 +0100
+++ gtk+3.0-3.4.2/debian/patches/102_do_not_duplicate_cups_custom_prefix.patch	2012-07-27 23:08:13.000000000 +0100
@@ -0,0 +1,18 @@
+## Description: Fix failure to print custom page sizes - do not duplicate CUPS "Custom."
+## Origin/Author: TJ <ubuntu@iam.tj>
+## Bug: https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/998156
+Index: gtk+3.0-3.4.2/modules/printbackends/cups/gtkprintbackendcups.c
+===================================================================
+--- gtk+3.0-3.4.2.orig/modules/printbackends/cups/gtkprintbackendcups.c	2012-05-02 13:44:17.000000000 +0100
++++ gtk+3.0-3.4.2/modules/printbackends/cups/gtkprintbackendcups.c	2012-07-27 19:07:42.894867275 +0100
+@@ -562,8 +562,8 @@
+         }
+     }
+ 
+-  /* Add "Custom." prefix to custom values. */
+-  if (custom_value)
++  /* Add "Custom." prefix to custom values (if they don't already have the prefix). */
++  if (custom_value && !g_str_has_prefix(value, "Custom."))
+     {
+       new_value = g_strdup_printf ("Custom.%s", value);
+       gtk_cups_request_encode_option (request, key, new_value);
diff -Nru gtk+3.0-3.4.2/debian/patches/series gtk+3.0-3.4.2/debian/patches/series
--- gtk+3.0-3.4.2/debian/patches/series	2012-07-03 19:03:14.000000000 +0100
+++ gtk+3.0-3.4.2/debian/patches/series	2012-07-27 23:08:20.000000000 +0100
@@ -23,3 +23,4 @@
 git_gtkstatusicon_segfault.patch
 git_get_property.patch
 git_api_documentation_tweaks.patch
+102_do_not_duplicate_cups_custom_prefix.patch