I've re-calibrated, re-counted, re-synched the whole forum and have removed the server stored cache files and theoretically it should be fine now! At least, there should certainly be no more disappearing threads, but as for the confusion in the browser bar between predecimal.com/forum and british-coins.com/forum I'm still personally experiencing problems with that. Anyone else having similar issues? This could cause people to become logged out. For the last two or three days (for me) it has been consistently predecimal.com, and there haven't been any problems. Likewise for me