Pop Quiz! Forum Software Upgrade

We're back up.  Annoying bug still there.

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I'll be doing a forum software upgrade today.  Sorry about the utter lack of notice, but, given my current spate of depression, I have no idea what I'll be up for on a day-to-day basis.

The usual parameters: starting noon Mountain time, 1800 GMT, and lasting as long as it takes. How much of the fix for the most annoying bug is IPB software and how much is system maintenance makes it difficult to tell how long this will take.