I have this crash bug in a templatized 2d blurring function. It does not occur in debug mode and if I put a print statement in the loop to tell me what iteration it is on, it does not occur either. I cannot see any reason it seg faults when looking at dumped core or using gdb manually, both using debug info + optimizations. It seems like an optimization issue (i.e. when I force the print statement it doesn't do the optimization that borks it...). I just upgraded to gcc 3.3.2 (most recent "stable" version on gentoo) and have been trying to get a company project to build correctly. My first inclination is to upgrade to the lastest "unstable" gcc version on portage (3.3.3 I think). Any suggestions? Adruab