I have a standalone PP 5.62 (I had the same problem with 5.61 and maybe previous versions??)
On some of my machines running IE7 if I am logged in as an admin and I click "logout" I get the "logging out please wait" message, which closes after a couple of seconds but I am not actually logged out - the home page still shows admin menu etc. This does not happen on all machines but I can't see any differences in the IE settings
On another machine running Firefox I have the opposite problem - I try to login and receive the "Login successful" screen but I do not actually get logged in - I remain "invisible" to the system
I've tried clearing the cookie cache but to no avail. I assume this must be some sort of browser problem but what settings should I be looking at?