There haven't been any great features added recently. Staying at 3.30 is good enough, until you get a game that requires a newer version. Charles is right 3.50 does added 3D Blu-ray support, if that's something you need.

Oh, and I'm back!

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris