Guys, problem you're having is related to how java is working with tiling window managers or rather not working. I had similar problem (I think) when I started using AWM (3y+ ago) you have to rename your WM session into something what java knows and know how to behave with.
Try using wmname from suckless-tools package. To be more precise try to set WM name into ex. LG3D by executing: wmname LG3D and then try to run josm (worked for me perfectly) -- |_|0|_| | |_|_|0| "Heghlu'Meh QaQ jajVam" | |0|0|0| -------- kuLa --------- | gpg --keyserver pgp.mit.edu --recv-keys 0x58C338B3 3DF1 A4DF C732 4688 38BC F121 6869 30DD 58C3 38B3
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