diff -u fontconfig-2.6.0/debian/fontconfig.postinst fontconfig-2.6.0/debian/fontconfig.postinst
--- fontconfig-2.6.0/debian/fontconfig.postinst
+++ fontconfig-2.6.0/debian/fontconfig.postinst
@@ -3,12 +3,14 @@
 set -e
 
 if [ "$1" = configure ]; then
-  # Ensure Defoma subst file exists, with some default substitutions
-  if ! defoma-subst check-rule fontconfig; then
-    defoma-subst new-rule fontconfig \
-      'serif --GeneralFamily,* Roman --Shape Serif Upright --Weight Medium' \
-      'sans-serif --GeneralFamily,* SansSerif --Shape NoSerif Upright --Weight Medium' \
-      'monospace --Width,* Fixed --GeneralFamily,2 Typewriter --Shape Upright --Weight Medium'
+# If defoma is installed, ensure Defoma subst file exists, with some default substitutions
+  if [ -x "`which defoma-subst`" ]; then
+    if ! defoma-subst check-rule fontconfig; then
+      defoma-subst new-rule fontconfig \
+        'serif --GeneralFamily,* Roman --Shape Serif Upright --Weight Medium' \
+        'sans-serif --GeneralFamily,* SansSerif --Shape NoSerif Upright --Weight Medium' \
+        'monospace --Width,* Fixed --GeneralFamily,2 Typewriter --Shape Upright --Weight Medium'
+    fi
   fi
 fi
 
diff -u fontconfig-2.6.0/debian/changelog fontconfig-2.6.0/debian/changelog
--- fontconfig-2.6.0/debian/changelog
+++ fontconfig-2.6.0/debian/changelog
@@ -1,3 +1,10 @@
+fontconfig (2.6.0-1ubuntu13) lucid; urgency=low
+
+  * debian/fontconfig.postinst: check for presence of defoma before 
+    attempting to use it. Fixed in debian 2.8.0-2. (LP: #503351) 
+
+ -- SevenMachines <SevenMachines@yahoo.co.uk>  Tue, 05 Jan 2010 13:18:19 +0000
+
 fontconfig (2.6.0-1ubuntu12) jaunty; urgency=low
 
   * more config rules cleanup; dont create 10-no-sub-pixel.conf link in package