Once last week there was a day I could get into the forums and see the usual "front page" with the listing of sections and active threads, but if I tried to go any deeper all I got was the top section of the page (everything from your in-house banner ads down to my "Hello Nightwing" status bar) and below that, a message that the thread was temporarily unavailable. For every thread.
It cleared up by the end of the day and I haven't had trouble since. I just assumed you were doing some site maintenance for a few hours.
If you're talking about last Thursday or Friday, that was a
database issue with the forum that lasted around 24 hours.