Index: trunk/server/common/oursrc/accountadm/signup-scripts-backend.in
===================================================================
--- trunk/server/common/oursrc/accountadm/signup-scripts-backend.in	(revision 2076)
+++ trunk/server/common/oursrc/accountadm/signup-scripts-backend.in	(revision 2101)
@@ -32,5 +32,5 @@
 while (<BANNEDUSERS>) {
     chomp;
-    complain("banned username") if ($_ eq $username);
+    complain("banned username") if (lc eq lc $username);
 }
 close(BANNEDUSERS);