--- XserverDesktop.old.cc	2007-04-23 21:41:34.995664000 +0100
+++ XserverDesktop.cc	2007-04-23 21:41:45.436316500 +0100
@@ -782,7 +782,7 @@ public:
   }
   void press() {
     KeyClassPtr keyc = dev->key;
-    if (!(keyc->state & (1<<modIndex))) {
+    if (!(keyc->state & (1<<modIndex)) && keyc->maxKeysPerModifier) {
       tempKeyEvent(keyc->modifierKeyMap[modIndex * keyc->maxKeysPerModifier],
                    true);
       pressed = true;