Jan, Two things. You may need to deinstall mozilla before you rebuild it as I'm not sure how tight that buildroot is. Second is to make sure you get the latest version of the mozilla gcc 3.1/3.2 patch that Franz made. I put a copy of it in a debian bug report against mozilla-snapshot...
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=158077&repeatmerged=yes Let me know if you have any problems with it. Jack ps We should check mozilla cvs sometime and hassle the mozilla folks if that are still sitting on that patch and not applying it.