What bugs have you noticed? For me it has improved things in a few areas such as so far it hasn't slowed down like all the previous firmwares between L662 and L683. Also fixed the "folder bug" that was introduced in L667.
My 722k with L686 software has issues regarding the skip back button. If I skip the back button twice it takes me back to the begining of the show. I have unplugged the receiver but nothing changed. Anyone noticed that?? Thanks.