diff -Naurp OLD/memtest86+-4.00//debian/changelog NEW/memtest86+-4.00//debian/changelog
--- OLD/memtest86+-4.00//debian/changelog	2010-06-07 11:21:44.000000000 +0000
+++ NEW/memtest86+-4.00//debian/changelog	2010-06-07 11:21:43.000000000 +0000
@@ -1,3 +1,10 @@
+memtest86+ (4.00-2.3) unstable; urgency=low
+
+  * Non-maintainer upload.
+  * Check for grub.cfg in postinst. Closes: #550337
+
+ -- Michal Suchanek <hramrach@centrum.cz>  Fri, 04 Jun 2010 13:50:53 +0200
+
 memtest86+ (4.00-2.2) unstable; urgency=low
 
   * Non-maintainer upload.
diff -Naurp OLD/memtest86+-4.00//debian/postinst NEW/memtest86+-4.00//debian/postinst
--- OLD/memtest86+-4.00//debian/postinst	2010-06-07 11:21:44.000000000 +0000
+++ NEW/memtest86+-4.00//debian/postinst	2010-06-07 11:21:43.000000000 +0000
@@ -12,7 +12,7 @@ if [ "$1" = configure ]; then
 	lilo
     fi
 
-    if [ -x "`which update-grub2 2>/dev/null`" ] ; then
+    if [ -e /boot/grub/grub.cfg ] && [ -x "`which update-grub2 2>/dev/null`" ] ; then
 	update-grub2
     fi
 fi