Just created a wikipost in this thread: http://www.flyertalk.com/forum/briti...c2-17-jun.html

On clicking 'Save changes' I ended up in a completely different thread: http://www.flyertalk.com/forum/briti...l#post20914337, which also has a (long-standing) wiki of its own.

No damage, as my new wiki was created successfully and the older thread was unchanged, but rather disconcerting

It seems to be reproducible by editing and saving again.