Does anyone else run into this? I'm on a mid 2009 MBP, 15" 2.66ghz. Seems like 8 times out of 10 (ball park estimate) that I start up the machine, after the Apple chime, my optical drive makes a blatant buzzing noise. The drive still seems to work okay but the noise persists. At first I thought it was a HDD issue, but I'm pretty sure it isn't. Anyone else have this?