Login/out button format

Hello Support

the login/out button is formatted differently depending on which page I am looking at when logged in.

Strangely enough what I am noticing is that it is formatted BLUE when on pretty much all project fork pages e.g.:
http://finalbug.net/component/pftasks/task/19-easy-social-start/14-easy-social-perfect/0-all-lists/112-login-out-button

But not on other pages such as:

http://finalbug.net/
http://finalbug.net/about-bug
http://finalbug.net/bruce-blog
http://finalbug.net/yakcontact

Please see attachments.

thanks

Paul