I may have, once and for all fixed my system. I got glibc stabilized a while ago. The problems I was having before were with linking. Stuff with pthreads would often not link, complaining about atexit(), and stuff with MMX would crash (segfault!!) the linker. Solution: download the binutils tarball, compile, install.
What have I learned from this? Don't trust incremental update patches
because they never work.