From: Skybuck Flying on
http://www.fixya.com/support/t2048473-cannot_log_out_facebook

Microsoft's advice won't work according to Swordfish:

"
I have the same problem as VeeHee. When i sign out of hotmail i get the same
message. I have deleted the browsing history & cookies but the message is
still there when i sign out.
Swordfish
"

Bye,
Skybuck.