Issue 93: "unclean" reinstallation of xmonad fails to restart (sometimes) http://code.google.com/p/xmonad/issues/detail?id=93 Comment #1 by dons00: When a dependent library changes, GHC's recompilation checker will not notice that the system needs cleaning, currently. At best nothing happens, often you get a linker error, at worst you get a segfault. This is GHC issue: http://hackage.haskell.org/trac/ghc/ticket/1372 Issue attribute updates: Status: Duplicate -- 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