Apache Friends Support Forum

Hi there. I've been running Apache on a Windows 2000/XP server for a year now and all has been well. But over the last few days, when trying to access some pages on a phpBB board and a php game application, I get a white screen with funny characters appearing on it. Pressing refresh in the browser usually displays the pages correctly. It's also not the same page or pages that it appears on. It appears to be random as to when it appears. Also, each time it appears it's the same characters - around 200 characters most of which are 'unreadable hex-type characters'. I've rebooted the server and restarted Apache/mySQL but the problem is still around.

Any ideas?