Thought I would add this info for any who are interested !
Kdlinks has all new firmware available
Fully support ISO and VOB; New UI; Support You-tube; Support Smart Play bonus feature & HD Lossless Audio feature
Also as an alternative firmware, Kdlinks firmware is based on the Kaiboer K355i
the unit itself looks alot different in appearance but the board in the K355i is Identical to the HD680 ( Kdlinks is a Kaiboer ! )
I choose to run the Kaiboer version of the firmware simply because they added a nice animated boot screen with sound...