I figured out what was causing 100% cpu usage.
anonymouse.plugin.php Line 151: change PHP_INT_MAX to 0.
There are still some other bugs that I don't know how to fix.
- Name doesn't show up when you start an anonymous discussion.
- When you delete a post it says "Fatal error: Call to a member function Get() on a non-object in /var/www/vanilla/plugins/Anonymouse/anonymouse.plugin.php on line 121
- The captcha image and box are bigger than the name box.