most browsers will automatically block the pm notification window automatically it seems.
a while back when i used to have a flood of pm\'s firefox, of which i always use, never blocked them, after an update though, it started doign odd things left and right, eventually i turned off then otification window and just glance at the main page for them though i dont get them nowadays :]
another odd thing is firefox keeps letting unwanted popups come through all over the place, sites i never got them form before. and its automatic update thing keeps messing around.
to be honest though, i\'d sooner set my keyboard on fire and turn catholic then use AOL browser xP