>>Can you give the version of IE and steps to reproduce ?
>
>Version of IE is 8.0.6001.18702.
>
>Steps to reproduce are random. I having been able to know exactly how they have implemented that. But, something is done somewhere to cause this reaction. This is what many of the site users have been face to during the last two years. It took me a while to figure out the source of this problem.

On your website when does the cookie get created?
What is the content ?
What is the expiration setting?