Hi all,
I have a Macbook Pro 15" that came initially with a 250 MB HDD which I replaced with the Seagate 500 GB/7200 rpm and run into all the horrible problems that has been discussed so extensively.
Obviously I had to downgrade to EFI 1.6 (SATA 1.5 Gbps) and since then the laptop has been working flawlessly and I was able to install via Boot Camp Windows 7, 64 bit edition, which is my main working OS.
After reading some posts here that, after installing the Performance Update, users were able to upgrade again to EFI 1.7 without any issues, I decided to try it.
Unfortunately no luck... As soon as EFI 1.7 was installed and the system restarted, problems started. Twice Windows or even OS X were not found and I was suggested to boot from a CD ⚠ In another case Windows Blue-screened during the start-up, and, if I could login to OS X, I was getting all those horrible freezes.
I reverted immediately back to EFI 1.6, and, that is the only way my system will work.
So sad, as this is my second Macbook Pro and I run into all sorts of freezing problems with the 1st generation of the unibody 15", due to the known nVidia 9600m problems.
It seems Apple cannot make a problem-free laptop since they moved to the unibody architecture and/or nvidia chipset platform...