Anyone having problems with ASP.NET 2.0 and certain versions of IE?

We recently upgraded our website from .NET 1.1 to .NET 2.0 and we are all of a sudden having some odd problems with certain versions of IE (we think we've narrowed it down to v2800).

For instance, when an AJAX call is made it will just "hang" for minutes at a time. We also get the same result with some very basic web controls like LinkButtons.

Has anyone else seen something similar to this or know what the problem may be? Upgrading browsers isn't an option because it's thousands of people and that would be pretty difficult.

Anyone having problems with ASP.NET 2.0 and certain versions of IE?windows server 2003

sure sounds like it's the server config or your app.. check the logs, how long does it take to make a trivial ajax call. is there something you are doing different in the http headers? does 2800 introduce some different encoding?

I'll throw in... that's what you get for trusting microsoft!