Logging in using IE and iframes.

First of all, yes I know iframes aren’t exactly ideal! 🙂 But everything works perfectly for my site except for IE users logging in. They can register, and wp recognises when the password is correct or incorrect, but if it is correct it simply redirects the user back to the comments page with the link to log in again instead of showing the comments form. FireFox/Netscape users have no problem. Any suggestions would be greatly appreciated!

At the moment I just have a link under ‘log in’ to open the blog in a new window for users having trouble, but I’d like to avoid that if possible.