Currently Being ModeratedFeb 7, 2013 11:54 AM (in response to Tesserax)
it stated happening after upgrade to lion. sounds actually a lot like the problems posted in the side bar e.g.: "How do i fix my late imac 2011 21 inch wifi problem? i am running os x lion right now and my wifi drops out after 5 or 15 minutes,my wifi is connected to my iMac but still the internet won't work, and then i had to disconnect and connect again to my wifi."
noone seems to be able to find a fix, not even the guys from the local mac support