Just to warn/inform people that for a good while now some threads/posts have been getting deleted automatically for some reason other than breaches of the posting guidelines. Several times when I have replied to threads my own post or even the whole thread have disappeared. In the former case every time I reply to the thread my post gets deleted.
It seems like a bug in the forum software but has been happening sporadically for months now. I've reported it to 48 but unfortunately the issue remains. So, if you post a query but then notice that it has suddenly disappeared, then this is probably the reason.
