I don't know. Can you give more details?
Is that only in your nabble forum or in your whole site? Does it happen when you are in our support forum?
Are these links posts, apps or another specific thing?
Was trying to track down a tracking error in Google Analytics tonight. Not positive, but this might be what I am seeing for that split second. That split second seem to be getting longer - maybe as much as a half a second.
It doesn't happen all the time but when it does it's not a great user experience.