Well I am dissapointed to announce this, but this is my FIRST problem with a mac. My 17" PB makes very weird noise when i pick it up and move it from side to side, or just tilt it in any direction. First it sounds like the fan is going very fast, and then a very squeecky (spelling?) noise follows, and while that happens my computer doesnt respond. This doesnt happen when my pb sits on my desk, but when i pick it up it starts going crazy. What can this be? the fan, or the HD?