Forum Error 503?
 

The same day that vbulletin started getting the error 503 a website I do work on also started getting this problem, it's never had it before and it seems to only be if users try adding images from Flick with the IMG tag. As it's never happened before was wondering if it's an error in version 4.2.0 or am I doing something wrong? Here's the error message:

Service Temporarily Unavailable

The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

Regards
Gav