Today when (instant) posting in the UA forum, I hit submit reply and got the data base error message. Using the back button fortunately found my text still there, so I tried submit reply again. At that point, I got the page with a box saying that I just has posted the same message a few seconds ago. Clicking to go back to the thread showed that indeed my post was fine.

I assume this was just a timing issue, with my post having been submitted just before some weird instantaneous data base problem. Then when FT tried to show me the last page of the thread with my post, the data base error prevented the page from loading.