i tried 4.43, and it gave me more detailed info, like i probably have no writing permission to dir, which is the point of all this mess.
solution (quick&dirty) : borrowed usb stick, copied installation there, playing from there, no problem.
this is unsatisfactory, but it is my problem, and i have to fix it later byt getting more priviledges from the compSupportDude, whom i am actually helping now (by playing muds)... :D
this happens on a computer with windowsXP and normal user *and* from hard drive.
this does not happen when running mushclient from usb stick. unfortunately, i forgot my usb stick today, so i need to dig deeper to this problem now...
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