Questione giuridica chiave
Whether the appeal could rely on the newly filed expert letter of 10 August 2011.
Decisione estratta
The new submission was inadmissible and in any event did not render the lower court's medical findings manifestly incorrect.
Motivazione estratta
New evidence was barred under Art. 99(1) BGG, and the expert evidence already on file supported the 60% residual work capacity found by the cantonal court.