[Plugin: WP Super Cache] nothing to repeat at offset 0 in wp-cache-phase2.php

I’ve had a ton of these errors (pretty much every pageview) for ages. They seem benign, never noticed an issue however now that I’m running stats on my error logs they are somewhat annoying. Anyone encounter this?

‘[Tue Jan 04 18:18:08 2011] [error] [client x.x.x.x] PHP Warning: preg_match(): Compilation failed: nothing to repeat at offset 0 in /x/x/x/wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 177’