I am trying to use Mathematica in Ubuntu. It works fine, and I have not found any problem working with it except that I cannot save a notebook because whenever I click the "save" button from the menu -> file -> save, Mathematica crashes and my desktop falls into a login screen. So, I guess what is crashed is not Mathematica, but probably GUI of the OS, say X. The same behavior shows when I click "open" button, too.
I haven't seen any other circumstances that gives me the same behavior other than Mathematica.
Before falling into the login screen, I could read an error message that quickly disappers, and it seems it is related to vtsspp.
Anyone has any idea?