Mac OS X 10.7.3 macmini4,1 standard Mac keyboard
You will see a JMenu with item providing a hint "Alt T" (alt displayed as a zigzag). You may click and get a proper action from there.
Now focus in a textfield and press Alt+t or Ctrl+Alt+t as it used to be some builds ago: there will be no action. Moreover, on Alt+t you'll see a dreadful symbol "dead" (a cross) typed in the text field! Long live Swing.