With the ebuild of 0verkill I am unable to connect to internet game servers. I get the error message: Invalid MD5 sum. Can't change level. Game Terminated. [...] It is possible to connect to servers created with the 0.16-r1 ebuild, but no one with a "normal" version can connect to those (getting the above error message). I tried compiling the source version from http://artax.karlin.mff.cuni.cz/~brain/0verkill/ myself and I could connect to cat2.ath.cx without problems.
use 0.16-r2, that'll fix ya, thanks