>>When I clicked on the link in Re: Unable to verify user Thread #1232603 Message #1232659, I was prompted to login. And this problem happens quite often.
>>
>>I also posted about this problem in MSDN forum "Bug reports for forum website".
>
>I did not have to log in by using the link you supplied.

I think I was wrong yesterday in my quick test. See http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1735277&SiteID=1&mode=1

Anyway, the problem is annoying and I don't know what started it and how can I get rid off the prompts (apart from being born again with clear history :))