It is a nice effect, but personally I'd prefer if only a little icon / text showed up within the bar itself - not covering a whole of the screen.
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It would be nice if it said "5 replies" - then I know to click on replies to see what they are. As it is, I click on it anyway (consuming server resources) just to find no-one has replied. And then, when I am away from the screen making coffee (or getting a beer) the pop-up appears telling me I have a reply, and then it goes away.So the pop-up consumes resource (presumably for all users, all the time) for no particularly useful effect.
That is unchecked. I read that as being for personal messages not forum messages.
But in any case it is not checked. However I still get the pop-ups.
Got another massive lag spike just then (about 4:25 pm Australian EST summer time). I don't get the strong impression that the forum administrators care, because all my posts here are ignored, basically.(About 5:25 am UTC on 29 March 2012).Even though I use AdBlock to stop the 2.5 minute lag when it tries to look up my outstanding posts, that of course does not stop other people tying up the database while it tries to do it for them.