Hi!
After a some testing with several tarballs, and installing a whole new system onto my pc (I had time over the weekend), I finally found out, that it is wxGTK2.6 wich causes the problem here. Even 2.0.1 with wx2.6 used up all resources.
Finally using 2.0.1 with wxGTK2.5.4 fixed my problem.
I hope I didn't waste your time too much, thanks for your help!
Lenni (now on gentoo)