I just did an emerge glibc -f After it downloaded the files, it started cleaning out my currect glibc!!! (If I didn't managed to stop it with CTRL+C, it would have removed my glibc, so I couldn't compile anything!) Portage shouldn't autoclean when using -f parameter, since it might destroy the system :(
Fixed in cvs
Great :)
portage-2.0.46