Hotmail logging out problem involving Facebook

I've been having problems each time I try to log out of my hotmail account from my home computer.

On every occasion I was getting the following message:

"Signing out

You're signing out of the following sites:

MSN Account Services

https://ssl.facebook.com/accept_token.php

If we can sign you out of a site, appears next to its name. If we cannot sign you out of a site, appears next to its name.

If we couldn't sign you out of a site, click Try Again to try signing out again.

When you're done, click Done."

(I've posted both image and text in case people searching need help finding the solution)

I've discovered it's solved by deleting all private data from your internet browser (except saved passwords).

Does make you wonder what's causing it though - it seems lots of people are having the same issue, and as it was solved by deleting cookies etc, it seems to suggest it's something nasty which has been downloaded.

Given Facebook's obsession with giving access (see blog below) to all and sundry to ALL your private data, and given the hotmail error message specifies facebook, who's to say that popular social networking site isn't responsible?

I've raised it with the Hotmail technical bods and I'll report back if they come up with a reason why this is happening.