Index: trunk/admin/include/mainscript.php
===================================================================
diff -u -r1016 -r1027
--- trunk/admin/include/mainscript.php	(.../mainscript.php)	(revision 1016)
+++ trunk/admin/include/mainscript.php	(.../mainscript.php)	(revision 1027)
@@ -280,7 +280,7 @@
 function ValidThemeName(name_str)
 {
 	if (trim(name_str) == '') return false;
-	var re = new RegExp('^[a-zA-Z0-9_ ]{1,}$');
+	var re = new RegExp('^[a-zA-Z0-9 ]{1,}$');
 	if (name_str.match(re)) {
 		return true;
 	}