omg I'm ceddybear?

As long as it was caching the entire request (http://www.southperry.net/showthread.php?t=27244&page=1, not http://www.southperry.net/showthread.php) I don't think that would happen..

The regex command I'm using on the URL is this:

^((?!\.php).)*$

Anything that is not covered by that command --> send to backend apache server.

I'm using nginx as a reverse proxy for static content.