Cannot Logout

I get the infamous logout twice if I click on logout in my theme (BuddyPress Daily Child 3.9.6) or buddypress (1.2.8) dropdown menu. This is WP3.1 – Logout once, nothing happens. Logout again and am taken to another page “You are attempting to log out” etc. Firefox and Opera have the problem while IE and Safari do not.

I read here that caching plugins and nonce can possible lead to a fix.

I use w3Total Cache but how to remedy this situation? Deactivating Total Cache makes the problem go away.