For the stuttering reports there is a fix. Either wait for the next LE update or grab firmware from here:
rename and replace start.elf/fixup.dat on the FAT partition of sdcard.
I had 2 issues with live tv, without setting sync playback to display, the sound was ahead of the video by about 1/2 second or so.
And I had to set deinterlace method to off, otherwise i had horrendous stutter on both SD and HD (1080p) tv streams from my tvheadend server.
Applying these 2 files has cleared up both these problems... I no longer have to keep toggling sync playback on and off when wanting passthrough when watching movies.. and tv is a lot more pleasant experience.