As far as I know, it's not possible to change the appearance of the drop-down scrollbar, which is annoying, but since changing the scrollbars' appearance only works in Explorer anyway I don't really care enough to look into it more thoroughly.

As for the changes I made, I added # signs before the 000000s in your border-color listing and changed '7 pt' to '7pt'. Sounds nitpicky, but most browsers are equally nitpicky and nothing pisses me off more than web pages that only work right in Explorer. (Well, that's not really true, but we can safely disregard that for the time being ).