Mine got messed up somehow, and it drove me nuts until I found this: jevon.org/wiki/Changing-Open-Dialog-Default-Sort-Order-in-Windows

UPDATE: “Only” problem is … the above didn't work! 🙂 Not for browsing folders through My Computer or whatever, anyway. The way you fix THAT is to set the view the way you want in the folder you're in, click Tools, Folder Options, View and click Apply to All Folders.