Hey guys, I'm curious if anyone else has this problem, and if so, how to fix it. First of all, I'm convinced this mac pro is a lemon, and it was supposed to get replaced on my last repair but the Apple Store decided not to. (Even after promising they would) I've been through 4 ATI X1900XT graphics cards, a logic board, a super drive, and a failed hard drive. Basically, I've not been able to really use my Mac Pro since December 2008. It's been in and out of service consistently since then. Anyways, I just got it back last night and was having problems keeping the airport connected. (BTW- it's done this before, but not since having my logic board replaced) It will pick up the signal, keep it for approx. 2 minutes, then drop it and "scan for networks" it will then find it again on it's own, and repeat the process over and over and over. I figured it was possibly software so I went through the trouble this morning of doing an erase and install on the machine, and much to my dismay that did nothing to solve the problem. I am unable to update any of my software, which means I can't use Aperture (because my library is on 2.1.3 and my disc copy is 2.0) so I basically can't use the computer until this is addressed. Has anyone else experienced this before? My mac pro is not far at all from our Airport Extreme Base Station (the first N version). My macbook get's full signal pretty much all the time. Even my iPhone does. I'm most likely going to have to go BACK once again for yet another repair. Any ideas? Sorry for ranting..