Interesting, what is your setting just below allow multi URL in the control panel.
Domains for HTTP Referer Check
and
Disable HTTP Referer Check?

Actually, I rolled back from IE7 to IE6 the same way; they're simply letting you KNOW you can do it now ...

Well I finally got around to installing IE8 on a xp3 machine.
I don't see a issue on at least three sites.
Including registering on your site. Possibly it is the referrer check that really is a issue.
As well as what internet security software is used???

I have occasional log in issues and users that report them too :/

Hej
I have disabled 'allow multi url, and enabled 'disable http referer check'.

Yesterday i had login problems onto UBBDev too, with IE8

Im not using firewall at all, and I dont think it's the problem. If I enter my site typing 'trosfrihed.dk' in the browser line, then im being correctly redirected to http://www.trosfrihed.dk, but im not getting logged in. If i close browserwindow, then open a new browserwindow and typing www.trosfrihed.dk in the browserline, then its possible to log in.

I did try to set my domain with and without 'www' in 'http referer check' and enabled 'http referer check' but it didnt changed anything

It sounds like IE8 doesn't want to set a cookie on the redirect. We had to put a special clause in for that just for IE7 and prior and sounds like maybe they've changed something again.

I need to find a guinea pig computer to install IE8 on so I can test with it.

okay here is what I tried using the example URls provided.
Which I did not try before. I had tested it using the URL in his signature
Both IE7 and IE8 has the same problem not able to login using trosfrihed.dk

Just for extra info IE7 is installed on a vista box and IE8 is on a xp box.
I tried this same method on my own site without the initial www or http and was successful.

Could it just be the way the particular site is handling the redirect on the URL?

I am having a rash of these once again myself. getting 1 or 2 complaints a day. I am running with referrer check disabled.


Mike

try enabling multi-url access like arentzen did.
See if the problem goes away.