So I've been ordering Crucial RAM for all my machines for years now. I've always ordered directly from them, and it's worked out very well. A month ago, I ordered a 1 GB stick of Crucial RAM from Newegg, because it was substantially cheaper than ordering from Crucial. It worked perfectly for a month, and now it's showing only 512 MB, half of what it's supposed to be. So, I call up Crucial, read them the part number, and they ask what machine I'm using it in. I tell them a 12" PB. The tech tells me "enough people have problems using these RAM chips in this model that we make a special version of the module just for Macs. I can ship you out a new module, but you'll have the same problem with it." Now, I don't dispute that they make a special module, because even with the same specs, the RAM I ordered from Newegg had a different serial number than the one on Crucial's website. But is it really because of some sort of incompatibility? I think that's absurd. The tech told me to call Newegg and see if they'd accept a return, then I could order the "special" model for my PB. Again, I think that's absurd. So, at this point, I can either try that, or have Crucial replace the RAM with the same part. The tech maintains there's nothing wrong with the chip, and claims the same problem will occur again with the replacement. Any thoughts?