Index: intern/ghost/intern/GHOST_SystemX11.cpp
===================================================================
--- intern/ghost/intern/GHOST_SystemX11.cpp (revision 27420)
+++ intern/ghost/intern/GHOST_SystemX11.cpp (working copy)
@@ -549,7 +549,7 @@ GHOST_SystemX11::processEvent(XEvent *xe)
 		}
 		case ButtonRelease:
 		{
-
+			bool dobreak = false;
 			XButtonEvent & xbe = xe->xbutton;
 			GHOST_TButtonMask gbmask = GHOST_kButtonMaskLeft;
 			switch (xbe.button) {
@@ -561,10 +561,13 @@ GHOST_SystemX11::processEvent(XEvent *xe)
 				 */
 				case 8 : gbmask = GHOST_kButtonMaskButton4; break; /* Button4 is the wheel */
 				case 9 : gbmask = GHOST_kButtonMaskButton5; break; /* Button5 is a wheel too */
-				default:
 				case Button2 : gbmask = GHOST_kButtonMaskMiddle; break;
+				default: dobreak = true; break;
 			}
 			
+			if(dobreak)
+				break;
+			
 			GHOST_TEventType type = (xbe.type == ButtonPress) ? 
 				GHOST_kEventButtonDown : GHOST_kEventButtonUp;