Hello Jens,
My system is:
Ubuntu 9.10 (karmic)
Kernel Linux 2.6.31-14-generic
GNOME 2.28.1
I got my version of C::B following this path (from the homepage of the site):
Code::Blocks 10.05 is here! (downloads)
=> Download the binary release
=> Linux 64-bit
=> codeblocks-10.05-1-debian-amd64.tar.bz2
Thanks,
Ana