diff -ruN ushare-1.1a-orig/configure ushare-1.1a/configure
--- ushare-1.1a-orig/configure	2007-12-09 14:03:36.000000000 +0100
+++ ushare-1.1a/configure	2008-04-19 22:48:35.000000000 +0200
@@ -130,7 +130,7 @@
     var=$1
     shift
     for f in $@; do
-      if eval echo \$$var | grep -qv -e "$f"; then
+      if eval echo \$$var | grep -qv -e "$(echo $f | sed -e 's|\.|\\\.|g')"; then
         eval "$var=\"\$$var $f\""
       fi
     done