Greetings,
just to report that the planeshift launcher, after the dowload of the last update on linux/adm64 crashes immediately.
I checked the logs and found out it's an md5 check who fails.
I tested the download on 2 mirrors with the same problem (test.something and http://planeshift.clevertech.net/Updates/ )

To solve the problem i went to the home of the planeshift intallation (mine is in /opt/PlaneShift)
and then unzipped manually the file pslaunchlinux64.zip with these commands from command line (as root):

cd /opt/PlaneShift
unzip pslaunchlinux64.zip

After that i did launch the planeshift program and answered yes to the update and, strangely but correctly, i finally
got the MD5 check pass message. Everything went fine.

If you're stuck with the update as i was, i hope this helps you too.