By execute i meant starting. Planeshift is in /home/scampbell/Documents/Spil/ so i went to its folder, opened terminal in the folder and typed: ./pssetup I got this message:
http://pastebin.com/m33e89c4

Afterwards it went into the program which looked fine except it fails to get connection to server, when pressing launch.

I then i tried ./psclient it started up just fine it seemed, though the graphic looks a bit weird, (pixels are huge around arrows).
I quit the game to see the command log, which looked like this:
http://pastebin.com/m625fd9d9

I tried just clicking on update and this time it also started up, but non of the mirrors seemed to be working, then it quit, and it looked like it removed a file.
Could this be true? or is the update just very small?

.....and thanks by the way