When I run "Rember", It gives me an error message reporting failure. There are messages in the log showing
FAILURE: 0xfffffdff != 0xffffffff at offset 0x045f3242.
What does this mean, and what should I do?
If you are not comfortable installing and un-installing hardware in a computer, you should take your machine to a service technician for diagnosis/repair.
If have experience replacing hardware, the only way to locate defective memory chips is by deduction - guess and check or split-half method troubleshooting. This may be updated in the future. You may also attempt to run the Apple Hardware Test CD or DVD that comes with most Macs. This may give more information (if it finds the problem).