I know that — this time I didn't as I didn't realise it was a major update and didn't check, plus I don't have as much time as I used to to look after my forum (I'm the only one technically capable out of my 11 volunteer mods and admins). This is entirely my fault. I don't have a DB backup as for a few months there's been an error exporting the DB through CPANEL/phpMyAdmin (page time out). I have logged a ticket with my host. I did a file system backup only before this update.You should always check to make sure all of your add-ons are compatible before upgrading. Do you have a backup?