In responding to a Pit thread, I got the white screen that says ‘There appears to have been a slight database error …’ – using my back button and resubmitting my response resulted in an unremarkable posting of my response. (I was using the Quick Reply form, FWIW.)
The reason I bring this to your attention is that we recently had a number of episodes on the Pizza Parlor where submission of a response to a thread resulted in that window – and the consequence is that the thread was “eaten” – missing from the database software’s indexing, and in some cases with contents completely missing.
Since we are both using the same version of vBB, to the best of my knowledge, I figured that a heads-up on the problem was not inappropriate, before threads come up missing here.
Josh over on the other board was able to recover threads by forcing a complete re-indexing through the “back end” – something I’m fairly certain you won’t want to undertake here.