Having trouble logging in with Internet Explorer?
Well, Internet Explorer sucks. Yes, it really does. 99% of reported problems are Internet Explorer related.
Try adding grubba to your list of trusted websites and set security for the trusted websites to normal or low.
Then go to Tools -> Internet Options -> Security -> trusted websites -> Custom Level.
Scroll to Miscellaneous and check the box next to “Access data sources across domains” and check the box next to “Allow scripting of Internet Explorer web browser control”. This should allow sites to run the AJAX enabled content.
You have to close and restart your browser for the changes to become active.
(also see: http://windows.microsoft.com/en-US/windows-vista/Change-Internet-Explorer-Security-settings)
By the way:
The best browser to use (at least we believe) is Firefox: much safer, faster and easier to use then Internet Explorer, and free:
Or try Opera (also great and completely free):