I just noticed this on the front page, I can't get in to see new photos, like before. Then I went to put everything back to normal (a page available if you click the Register link) and I noticed something that essentially answers the question. Here's basically what it says, and in bold is the problem.
The server www.airliners.net
wishes to set a cookie that will be sent
to any server in the domain .airliners.net
The name and value of the cookie are:
This cookie will persist until Wed Dec. 31 16:00:01 1969
Do you wish to allow the cookie to be set?
Head in the clouds... yet feet planted firmly on the ground.