I have Windows XP here at work and went back to try Explorer again and I can see replies on Explorer. I have Explorer 8, as Explorer 9 is not available with Windows XP.
Another interesting thing is on Explorer 8, I have a right side bar and headers, etc.
On Google Chrome, I have no side bar and no headers. I can't tell if I am on signed on, etc. etc.
Not sure why it matters, so I hope it eventually works for all browsers.