I have a notification of a reply to a comment of mine which doesn't disappear from the notification icon on the top of the page. I click on it and it clears but, when I refresh the page or go to another page, there it is again. It happened right after the scheduled maintenance today.
This is an artifact of some fail-over testing we did during the weekend. Sorry about the noise, this should be cleared up for everyone by now.
For those that don't know, we have redundant data centers, data replicates between them. If something happens in the US East, we can (very quickly) come back up in Oregon, without anyone losing anything they've recently written.
The process of doing that is remarkably smooth given what's involved, but there are some rough spots we're trying to smooth out.