ok, so I'm logged in using Firefox version 3.0.13 and testing to see if I can type beyond the text box without having to enlarge it. I had to use Firefox for a class this summer but I'm still pretty much in the habit of using IE8 for some reason... old habits die hard. I was a big fan of Mosaic when the Internet first became graphic, even bought a book on how to use it. Then Netscape came out and wow was I really a fan! But somehow IE managed to overtake the market and there you go. So, the answer is, yes, the text box scrolls using Firefox, so it seems to be an IE8 issue. Good catch!
YMMV. Viewer discretion is advised.