Alt+> and Alt+< don't work in METAL theme. The normal function is to navigate by word.
Metal and Nimbus are Java cross platform Look and Feels. You you wish to get the full compatibility with Mac standard shortcuts, you need to use Mac Look and Feel.
They may not work if Mac uses them for its own actions.
They work now!
HL
Alt+> and Alt+< don't work in METAL theme. The normal function is to navigate by word.