PHP 4.0 Segfault under RH6.1

I'm about ready to give up on PHP (at least PHP 4.0). I submitted configure details as well as a backtrace and that obviously wasn't enough to give anyone an idea of what's going wrong. Since a number of users are experiencing the same problems, I guess it must be a difficult bug/issue to trace. Anyway, as a last resort, I'm wondering whether anyone who experienced anything similar was able to get PHP 4.0 running by shuffling around or removing modules compiled into apache. The candidate I'm most interested in is mod_perl (which I have statically compiled into apache) since it has so many hooks into apache. Although mod_perl hasn't caused me any problems with php 3.XXX, maybe PHP 4.0 is more sensitive. As you can see, I'm flailing around, but I'm desperate to avoid resorting to Perl when PHP with Zend is the obvious solution. thoughts? cheers