I tried in IE, FF and Chrome and none worked. I'll try clearing my cache/cookies, though.

EDIT: Ok, new tests after clearing cache!

Chrome: Works fine, but sending text takes an extra second compared to Opera.

Opera: Works fine

Internet Explorer 9: Chat display is fine, but the online list won't appear until you switch between languages. We cannot send text at all.

Firefox: Works fine, but we cannot see all the text at once. There's a vertical scrollbar.