badger98,

I have the NAD T752, I do have the volume beep or click sound when the level is adjusted, but to me this is a non issue since the sound is at a level that is barely audible. I still have the older firmware in mine, but I believe the newer ones gave the option to turn off the OSD volume changes which eliminates the sound.

As for your other issues, I don't have them and it is the first time I have read about them with the 752. Hope this helps.