Samsung UE40C6000 Audio sync problem using DLNA and USB

This TV are delivered with two different motherboards; T-MSX6DEUC and T-VAL6DEUC. The first one will give you audio sync problems using DLNA wired or not, also when using content from a USB source. Further more the T-MSX6DEUC will also give you NO preview pictures of the media files from USB sources. T-VAL6DEUC version of the motherboard will give you pree view pictures of the madia files when playing from a USB source. If you are so lucky that your TV comes with T-VAL6DEUC version of the motherboard there are no such issues, and that goes for the audio sync problem too. The biggest problem are when playing AVI files(50ms to over 1sec out of sync). The only solution I have found is to have the motherboard changed from T-MSX6DEUC to T-VAL6DEUC. Are there any Samsung officials on this forum that can confirm my findings? Also there is no way of knowing what kind of your motherboard the TV comes with before you buy it. This can't be how a major TV manufacturer, such as Samsung, should treat their customers. So Samsung, what are your solution to this major annoying problems? HELP!