Apologies to anyone who posted over the weekend and had problems.
We asked the hosting company to perform an update to the forum software to bring it up to the latest version. They cloned the live site and applied the update to the copy to check everything would work OK. They were supposed to wait until we'd approved the update before changing anything on live.
Somehow a few links on the website pointed to the copy and some users ended up looking at the cloned website and posting replies over there.
I've managed to recover these few posts (34 to be exact) and will contact the users with the missing post info so they have the option to re-post if they'd like.
Apologies for the inconvenience. We'll make sure everything is running fine for a few days and then plan in some maintenance time to update the site properly ourselves.
Any questions, please reply to this thread.