Child PID exit signal Illegal instruction (4)

Hey,

I'm running PHP 5.2.6 on FreeBSD 7.0-RELEASE-p2, using apache 2.2.9. I
have a PHP script that is valid code (I tested it on another server
and it worked fine). The problem is, it keeps killing the httpd
processes and outputting nothing.

I get this message in my apache error logs each time the php script is called:
[Wed Jul 16 20:10:18 2008] [notice] child pid 70553 exit signal
Illegal instruction (4)

And same thing in /var/log/messages:
kernel: pid 70649 (httpd), uid 80: exited on signal 4

I read that it has to do with PCRE, so I tried commenting out all the
preg and ereg functions, but that also didn't work.

Here's a list of the modules I'm using:
[PHP Modules]
bz2
date
dom
filter
gd
geoip
hash
iconv
libxml
mbstring
mcrypt
memcache
mysql
mysqli
pcre
Reflection
session
SimpleXML
sockets
SPL
standard
xml
zip
zlib

This is really frustrating me. I'm about to switch over to Lighttpd to
see if it would help :-\

Any suggestions/ideas/comments/solutions would greatly be appreciated.