Hello Yesterday i tried to un pack a ZIP file - which failed. The error was something liek unknown file format.
I checked synaptic and zip/unzip is installed.
I have to add i didnt tried the terminal i choosed right-mouse-click and open, and i tried open with other application and enter the command "unzip".
So the file was a packed ISO and huge, well i than transfered it over my WLAN to the XP Desktop and than i was able to unpack it ...
Maybe this is intresting.