Hi Eric,
The simple answer is yes. The more detailed answer is that main site address has always been .com but we also own the .co.uk, .info and .net domains. Normally the first three will all work indentically because the .co.uk and .info domains are parked on (or point at) the .com address. This means they all actually fed by the same web space. The .net is different, although the root links back to .com - this is where we host the Virtual Tour.
The 'fix' of the forum problem involved moving the site to a new server but only the .com address was moved to begin with. The other two remained pointing at the old server until everything was sorted out.
When they've finished moving everything around all three domains should work exactly the same again, however it is best if you use the .com for favourite links as it will (or should) always be the first one to work properly in similar circumstances.
There is likely to be a little more disruption as I understand we will be subject to another server move in the near future. It's possible this is something to do with the .co.uk not working at present. I'll advise about this when I know more.