Arghhhhhhhhhhhhhhhhhhhhhhhhhh !!!!!!!!!!!!!!!!!
Do you use vmware server?
Do you all of a sudden fail to connect to a vm's console?
With this message: Cannot access virtual machine console. The request timed out. The attempt to acquire a valid session ticket
Well it happened to me too.
Turns out the 3.6 version of firefox work work with it.
I had to downgrade to a older version and it worked.
Get old versions of firefox here: ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/
11/23/2010