I installed a plain vanilla FC3, it only has xdm and xfce, no gnome or kde. I was unable to run neither mozilla (dies in PR_dtoa) nor firefox (dies in JS_dtostr). Digging and digging I found out that gcc seems to be the problem, maybe. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17560 The only part that doesn't fit is that I wasn't using any optimizations as far as I know, unless the they occur even with --enable-debug I tried a Makefile patch I ran across that explicitly turns off optimizations for prdtoa.c. The problem shows up later during the build when PR_dtoa gets used by shlibsign. Anyone know what's going wrong? Please tell me I just need to install some package to fix this. tia, Richard