Updates: Labels: -Priority-Critical Priority-Medium Comment #4 on issue 336 by SpencerJanssen: xmonad won't start: Irrefutable pattern failed for pattern (Data.Maybe.Just nbc_) http://code.google.com/p/xmonad/issues/detail?id=336 From some testing on http://hpaste.org/fastcgi/hpaste.fcgi/view?id=12122#a12127 , it seems that XDefaultColormap is returning garbage (18022232529829921, rather than 32 on most systems). Perhaps GHC is miscompiling the X11 bindings, or the user's libX11 is busted? Unless some OS X testers can reproduce this, I can only assume this is a problem specific to this user's set up. -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings