Hi, I experience the same issues as in: https://mail.haskell.org/pipermail/xmonad/2016-March/015047.html avoidStruts works for me in 0.11.1 (not compatible with the newest ghc 8.x.y in debian sid). In version 0.12 (cabal-default) it does not work on the first workspace, but starts working after pressing (mod-shift-space). In current git version xmonad (8b055621e92e7ade127043e968f50713c15a00a0) / xmonad-contrib (ec5f9a9e59ed5fa6bbd4c3850e4025526155f86e) my xmobar is never visible as soon as there is any other window. I have tried to work with sanboxes and different ghc versions but it is all very painful as I have to cd into the correct sandbox and even then xmonad must use a certain ghc version on startup when it compiles it's configuration. Please let me know how I can help debugging the problem. I know a bit programming and a few haskell basics. So please give me enough details to be helpful. You will find me as obiwahn in #xmonad@freenode.net. Regards Jan Christoph Uhde