diff -up comm-1.9.2/mail/installer/Makefile.in.version comm-1.9.2/mail/installer/Makefile.in
--- comm-1.9.2/mail/installer/Makefile.in.version	2010-05-21 11:42:45.000000000 -0700
+++ comm-1.9.2/mail/installer/Makefile.in	2010-05-25 15:16:18.446197181 -0700
@@ -44,6 +44,8 @@ include $(DEPTH)/config/autoconf.mk
 
 include $(topsrcdir)/config/rules.mk
 
+MOZ_APP_VERSION="__RPM_VERSION_INTERNAL__"
+
 MOZ_PKG_REMOVALS = $(srcdir)/removed-files.in
 
 MOZ_PKG_MANIFEST_P = $(srcdir)/package-manifest.in