--- mozilla/widget/src/gtk2/nsWindow.cpp.unknownmousebutton	2005-12-21 02:38:20.000000000 +0100
+++ mozilla/widget/src/gtk2/nsWindow.cpp	2006-08-24 15:14:48.000000000 +0200
@@ -1543,6 +1617,9 @@
         return;
 
     switch (aEvent->button) {
+    case 1:
+        eventType = NS_MOUSE_LEFT_BUTTON_DOWN;
+        break;
     case 2:
         eventType = NS_MOUSE_MIDDLE_BUTTON_DOWN;
         break;
@@ -1550,7 +1627,7 @@
         eventType = NS_MOUSE_RIGHT_BUTTON_DOWN;
         break;
     default:
-        eventType = NS_MOUSE_LEFT_BUTTON_DOWN;
+        return;
         break;
     }