Try to start the update in "auto-update-mode".
For that open up a konsole (kde you said?

) and "cd /path/to/planeshift/", then run "./updater -auto".
This will skip the gui for the updater and just download the latest updates and install them...and guess what, it only takes a few minutes this way, while the gui version seems to have some bugs that makes it take ages to do the job.
Hope I could help you, let us know if it works

Cebot