Apologies for that - we had to do an emergency server upgrade this morning, and we ended up losing about 6-8 hours worth of playing statistics in the process. It has affected all players similarly.
If you notice any other problems on the site please let me know via firstname.lastname@example.org
- there was one small bug now which was causing puzzle labels not to display properly, but that should be fixed. The new server is running more modern software so there may still be some incompatibilities.