Clients cannot connect after a few hours

I just got the newest model Airport Extremem on Friday to replace my 1st Gen unit. Today I nocited that all my wireless clients could not connect; they can see the Wireless but will fail to connect. The only way to fix it is to unplug the airport and plug it back in. Wired clients are not affected. I have not checked to see if the issue affects 2.4 Ghz clients since I have only noticed the issue with my 5 Ghz connected computers.
Also Apple says the operating temp is max of 95° F (http://support.apple.com/kb/SP628); however, when I use my infrared thermomitor on the top of the unit I get around 130° F. Not sure what other people are seeing but that seems a bit high.
Thanks
Chris

For anyone who might still be interested in this question. It started kocking all the clients off wireless after about 10 minutes shortly after postling this question. I brought it to the Apple store and the Genius looked at it and gave me a replacement unit. The new unit has been running for about two days and has only hit a maximum surface temperature of 112° F.

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I will copy and paste it:
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