Hi,
I know that TM2 currently does not support Lion-only features like full screen.
I'm working with Lion and a US keyboard and I don't manage to open the characters popup. When long-pressing a key, the letter is just repeated like before Lion.
I hope there is a workaround for this or there will quickly be a fix because the characters popup is really handy for everybody working with non english text...
Sincerely,