ASP.NET MVC Authentication Issues with internet explorer

Log in/Log out isnt working, and uploading photos gives an error in internet explorer. Its working fine in firefox. We've already launched the site - and nobody has been able to enter the co开发者_如何学Cntest yet.

Heres the link:

[Url Removed]

Any help is appreciated. I can provide the code where requested.

edit I don't know how else to describe the issue other than the default _LogOnPartial.cshtml file and the default Login/Logout actions in the AccountController.cs do not appear to work on this website hosted on IIS7. Running from localhost I can't recreate the issue. That domain is forwarded with masking to [Url Removed], but accessing that domain directly doesn't solve the issue.

Well, the issue is now resolved - It was due to the forwarding with masking affecting the way internet explorer was handling forms. We purchased a dedicated domain for the contest and can now log in and out without issue as well as upload photos without that error. This was a very odd problem.