Hard Freeze when Using FireFox, Unison-GTK, and some other GTK apps

Hard freezes are unpleasant at best. They also prevent you from tracking the source of the problem. You speculate, based on the "familly" of applications you encounter problems with, and try to obtain some resolution. At first it was FireFox. I’ve removed it to install Galeon instead. Didn’t help. I left it at that, and…