Sometimes I curse the day I decided to get a 64 bit box. Everything is fine until I want to build something by hand or upgrade something and then if it doesn't just work it is like a maze of problems.
Recently I was trying to build firefox from source along with XULRunner so that I could try out JavaXPCOM. The first problem I ran into was a GCC 4 bug that breaks the build. Luckily someone out there had an easy fix for the problem (see GCC4.0 – relocation R_X86_64_PC32 against memcpy@@GLIBC_2.2.5 can not be used). After getting that problem fixed an a little fight with setting up XULRunner I got a very simple program working. That is when the 2nd problem showed up. When I tried to use some of the GUI functions I started getting core dumps from within GTK2. At that point I gave up and moved to my laptop. The same code worked right off using my laptop.
I should have instructions soon on how to embed gecko into a java app with JavaXPCOM. There isn't much documentation or example code out there on making it work. As for the 64 bit box, I think I have had about as much of it as I can take. At least it can run in 32 bit mode when I decide to re-install.