Well, ok, I just went and tested it again, and now it's working. Sigh. There are three things I can think of that might have fixed it:
1) I re-installed Office, replacing the 64-bit version I had with 32-bit. (Stupid, broken SAS 64-bit ODBC driver. grrr.) However, the 64-bit version is what is working fine on Win7. Also, I don't think that the problem was limited to Office, but I'm not certain of that.
2) Patch Tuesday might have released something that fixed it.
3) I opened the Mouse control panel, but made no changes. Still, it may have triggered some Windows setting. This is my best guess, because I think I did #1 and #2 and still saw the problem after - I'm not 100% certain of that, though.
Oh well, the bottom line is that I can scroll again, so, all's well that ends well, I guess.
