Collaborator WebUI looks different for different people

Hey everyone

I have two Collaborator users who have behavior that the rest of us do not

- one user is not getting document differences highlighting

- Another user has the 'chat window' doing weird thing after he adds a comment (the window collapses, then the comment windows get big enough to occlude the function buttons)

I'll submit tickets for some of these, but I'm curious if other have had Collaborator WebGUI act different for some people, even while they use the same browser and have the same settings as everyone else.