I thought I'd mention a problem I had with my new Vista installation. 

I have a separate partion for my data, so when I upgrade to Vista I didn't do a clean format of the entire drive, but just did a clean install of Vista. Works great!

The only exception was that I did not have permission to access, modify or delete some files on my data drive. I am an administrator, what do you mean I don't have permission?  After googling the problem, I discovered that the owner of these few wierd files was an unknown entity.  To fix it, I used the Advanced button the security tab of the file/folder properties to change the owner to my admin account.  Once I had the ownership, it was as simple as adding the appropriate permissions.

Works great now.