MACBOOKS HAVE ISSUES WITH RAM AND FAULTY NVIDIA GPU?

I thought Macbooks were the best notebooks ever? I guess even the best have their problems as reports of RAM and NVIDIA chip problems continue to surface about Apple's new Macbook systems. Apparently installing 4GB of DDR3 RAM from Apple or third party sources is causing the Macbook's and the Pro's to freeze up. The problem can be fixed by dropping the RAM down a notch to 2 or 3 GB.In terms of