Lennart has mailed me to say that the Yabbse software which this forum runs on is out of date and no longer supported.
So he is going to upgrade the software. While he is confident that this will not be too difficult, it will mean some more down time. He is expecting to be attempting this tomorrow morning (Wednesday).
I'm not sure that the appearance will change much, nor the functionality. The new product was developed by those who developed this product so externally much is the same.
However you may find you need to re-bookmark any direct links to the forum as the address has changed.