There were literally three revisions of the 17-inch MacBook Pro within eight months in late 2008 through mid 2009. The “late 2008” (older pre-Unibody design) buyers were probably none too pleased when the “early 2009” (Unibody) update showed up just a couple months later. And then the ”early 2009” buyers had to deal with a speed-bump update that was released only a few months later…