Mountain Lion problem with HD camera of the Macbook Air

after upgrading to Lion Mountain (10.8 and also 10.8.1) I have a lot of problems with the web-cam on my macbook air (mid 2012), sometimes it's not recognized and tells me that there is no web-cam connected, it also happens to others?
after the restart compiuter it's recognizes and works, but after a while i have the same problem again...

Hi,
I would try a PRAM reset.
Shut down the computer.
Restart it holding down Apple/CMD ( or ⌘)+ALT( ⌥)+P+R Keys until you have heard three Start Up Bongs.
8:33 PM Friday; September 14, 2012
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
 iMac 2.5Ghz 5i 2011 (Lion 10.7.2)
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro 2Gb (Snow Leopard 10.6.8)
 Mac OS X (10.6.8),
"Limit the Logs to the Bits above Binary Images."  No, Seriously

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