Hi, today I added XEvents handling to xmobar, a status bar you should know I'm writing. Now, this is more difficult of what I first thought, since xmobar makes heavy use of Haskell threads. Since we need to call XNextEvent, it seems, as far as I can understand, that this is going to block every other Haskell threads, unless the threaded RTS is used and/or (?) forkOS (which requires anyway the threaded RTS) is used instead of forkIO. While this is working fine on my system, I have a system with an old Xorg build (I cannot compile X11-1.2.2 and X11-extras on that machine), which seem to block all threads no matter what I do. This is not a valuable test for me, so I need testers to confirm or refute my personal test. Here you can grab the source, which now requires x11-extras (I think that 0.2 should go, but I did not check: please let me know if you find out): http://gorgias.mine.nu/xmobar/xmobar-0.7rc1.tar.gz If no tester will show up, well, no problem: no refreshing xmobar will be released....;-) ciao andrea