--- revdep-rebuild_r453	2008-01-21 14:30:19.000000000 -0500
+++ revdep-rebuild	2008-01-22 17:21:48.000000000 -0500
@@ -13,6 +13,9 @@
 ##
 # Global Variables:
 
+# Must-be-blank variables:
+unset GREP_OPTIONS
+
 # Readonly variables:
 declare -r APP_NAME="${0##*/}" # The name of this application
 declare -r OIFS="$IFS"         # Save the IFS