Comment 22 for bug 706918

I first noticed this problem when I started running Conky. However, it had nothing to do with Conky itself, but rather with the rule I put in ccsm (CompizConfig Settings Manager) to disable shadows on the Conky window [i.e. Window Decorations -> Shadow Windows = (any) & !(class=Conky)]. This causes Compiz to segfault in libregex.so, probably because it's using regex to try to match the window class/title. To prove this, I stopped running Conky but left the rule in place and, sure enough, Compiz continues to crash at random times. Removing the rule fixed the intermittent crashes in my case.