Hello,
i'm using pac version PAC 4.5.2.3 on ubuntu 13.04 x64.
When i launch rdp connection all is fine, but if i change desktop using hotkey Ctrl+ALt+Arrow and come back i've frequently got problems with sticking Ctrl or Alt buttons.

Another problem is that if hotkeys changing input language in my system is the same(for example, Alt+Shift) that in rdp session then i simply can't change the language in rdp session.