diff -Nur mozilla-release.orig/browser/installer/Makefile.in mozilla-release/browser/installer/Makefile.in
--- mozilla-release.orig/browser/installer/Makefile.in	2012-07-17 16:19:29.480356991 +0000
+++ mozilla-release/browser/installer/Makefile.in	2012-07-17 17:32:41.250937293 +0000
@@ -50,7 +50,7 @@
 MOZ_PKG_MANIFEST_P = $(srcdir)/package-manifest.in
 # Some files have been already bundled with xulrunner
 ifndef SYSTEM_LIBXUL
-MOZ_PKG_FATAL_WARNINGS = 1
+MOZ_PKG_FATAL_WARNINGS = 0
 endif
 
 MOZ_NONLOCALIZED_PKG_LIST = \