i have Ubuntu 12.04 LTS and Sykpe
It worked normaly for a few months until today.
When I open a chatroom in Skype, the new window fills the complete screen.
I can't see the top bar or something else anymore.
There is only Skype.
Because of the missing top bar, I can't even close Skype.

After a restart, it happens again.

Does someone know this problem?
Or can anyone halp me?

Thank you very much