Hmmm. Well my only thought in response is that just a month or two ago, before the D630 came out, I was able to go on the Dell website and do a custom configuration of a D620 that was part-for-part the same as my computer. Unless they changed out the motherboard, it seems there is no difference between a "pure vista" machine sold by Dell in early 2007, and my "Windows Vista Capable" machine sold in September 2006.

Unless I get a solution on this forum, it looks like I'm in for a clean reinstallation of vista on some coming weekend. I just hope that solves the problem. Otherwise, I'm going to have quite a fight when I call up Dell and tell them they need to replace my entire notebook.