Sir, there's really nothing wrong per say. It is a safety feature which is telling you that your computer must resend info in the form of cookies to continue. This makes sure that you are who you say you are (and nobody'd hijacked your line in etc).
I get this mainly if I reply then try to back up.
It's a Microsoft thang man.
Seriously, not much you can really do about it. You might try increasing the space in your temp folder under Internet Options, but I don't think that would really do it.