I've had a couple of reports recently that trying to access the forum results in a:
(I'm not publishing the xxx.xx bit, for obvious reasons !!)General Error
SQL ERROR [ mysqli ]
Can't connect to MySQL server on '213.171.xxx.xx' (111) 
An sql error occurred while fetching this page. Please contact an administrator if this problem persists.
And it has happened again this afternoon.
A support ticket was raised with the hosting provider - and a few minutes later, the forum came back online.
If this happens too much then I'll have to see about moving this to a dedicated server, which might cost quite a bit more than the current fees I'm paying...
But for now, if it happens to you - just break your connection, and come back in an hours time, if you can. That might give the server a chance to catch up !!