Login not working?

I as Admin, as well as my Editors (read: client), can log in. However, when hitting View Site the site comes up with the Login still showing. This problem is new. In fact, I have added a couple lines of code to the comment page so Editors / Admin comments are highlighted.

My active plug-in are:
– ShareThis 2.3
– wp-cache 2.1.2
– WP-SpamFree 1.9.8.2

Yeah, I know. There are probably some other plug-ins I should take advantage of but I need to get this sorted first for the client.

Thanks in advance for your help, etc.