I did a clean install of Ubuntu 12.04.Everything is working fine except Thunderbird.I did not format the home partition so all of the settings are the same as on ubuntu 10.04.Also I had moved the window controls to the right and now I have the controls at the right too.I can not use the default ambiance.But this is not important right now. I need help with thunderbird,when I click on it nothing happens,I get the new message indicator but can not open the messages,but I can open the compose new message and contacts.But can not open the default thunderbird window.Removed and installed again but nothing changed.This must be about the config or add-ons of the old thunderbird but I do not know how to make this work.Please help!
sorry for late reply but i didnt know much about thunderbird great you solve it ) by the way how you make controls(unity bar) at the right.