[xubuntu 10.04..... just two days until 12.04!]

I'm hoping someone can advise on what to look for with what seems to be a forum access problem.

I belong to a classic car forum which has recently decided to change server and forum software. They claimed the vBulletin was having problems. This i question as the Ubuntu forum as many of you probably use is also vBulletin with 1.8 million members and doesn't seem to have problems. The car group are now using Xenforo - anyone any experience of it?

I'm using the Chrome browser which i've found fast and without problems so far. I regularly use forums which have the phpBB, SMF and Invision software without problems and fast as well.

The problems; difficulty logging in and logging out (like 3-4 attempts), navigating round the forum is very slow if in fact i can enter a particular thread (when i can another 3-4 attempts are required). Going into Settings then activated a window with a message saying a server problem. It would seem to me [not that much IT expertise!] that there is server problem rather than a browser problem. Emailing the Administrator revealed that he uses linux Mint with Firefox - i thought most likely a problem with linux when other folk are using windows. Could there be a problem with Xubuntu? Chrome problems... well i tried a few of the other browsers earlier today and little difference - so Chrome doesn't seem likely. If Xubuntu what could be the problem because i want to sort it before putting 12.04 on - wrong setting somewhere... he's able to use Mint ok!

I know this seems vague but i'd be very grateful if someone could give some pointers to investigate.

thanks james