When turned on I get a webpage filled with the follow-
Parse error: syntax error, unexpected '<' in /home/cnczone/public_html/forums/includes/class_core.php(4724) : eval()'d code on line 1
This can happen if you have the Cache Templates in File System enabled, and you caught the system just as it flushed the cache. If this problem persists, I recommend turning that particular feature off.