My Security.SE and Bitcoin inbox notifications aren't working correctly. I've had a few posts have new answers( that I have asked) and never received notification of the comment or the answer.
I'm not active on StackOverflow recently so I can't say if the issue applies here as well.
I used Chrome/Safari latest on OSX and Win7
(Edit: I have multiple browsers open on several machines at the same time. Not sure if this is related, but it always worked in the past)