Index: openacs-4/packages/dotlrn/tcl/community-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/dotlrn/tcl/community-procs.tcl,v
diff -u -N -r1.234.2.10 -r1.234.2.11
--- openacs-4/packages/dotlrn/tcl/community-procs.tcl	24 Nov 2020 15:40:11 -0000	1.234.2.10
+++ openacs-4/packages/dotlrn/tcl/community-procs.tcl	24 Nov 2020 18:22:13 -0000	1.234.2.11
@@ -1225,9 +1225,9 @@
         set errmsg ""
         set valid_p true
 
-        if {[regexp {\s+} $community_key]} {
+        if {![regexp {^(\w|_)+$} $community_key]} {
             set valid_p false
-            set errmsg [_ acs-templating.Invalid_url_element [list value $community_key]]
+            set errmsg [_ acs-tcl.lt_name_contains_invalid [list name $community_key]]
         } elseif {![db_0or1row collision_check {
           select 1 from dual where exists (
             select 1 from dotlrn_communities_all