Hi, I don't know if these patches ere going to be accepted, anyway this is my proposal: XMonad should not respond to CrossingEvent(s). That is to say, it should be the layout to decide whether entering a window with the pointer makes that window focused. The present behavior is incompatible with Tabbed (it forces a redraw of tabs every time the pointer enters a window). Moreover I don't like very much the fact that a keyboard driven WM gives such a power to the mice. It is possible to adopt a different approach, with the second patch attached: a layout modifier that makes a layout respond to CrossingEvent(s) by giving focus to the entered window. Unfortunately this second patch is incompatible with Tabbed too (well I'm not going to use it with Tabbed, obviously...;-), and in general with layouts that add hooks to modifyLayout the way Tabbed (via Decoration) does. This is a more general issue we should take care of: there's probably the need to add hooks to respond to different X Events, like Decoration.hs, without messing up with other hooks. I need it for my remote controlling stuff. But I'm not the only one. Indeed the same problem can be seen with SwitchTrans.hs (Lukas decided not to let David do the nice stuff he does with modifyLayout ...;-). This is also the reason why XMonadContrib.LayoutHelpers.idModMod is not a real identity, like erasing something is not anything anymore. We are hitting this problem frequently... Andrea