What is causing my new track info to disappear?

Question

Using OS 10.7.5 on a Macbook Pro running iTunes 10.7.
I've been entering genre, bpm, and grouping data for song files I copied over from my older Mac before I junked it. Several times now, I've entered data for hundreds of tracks only to go back later and have the data gone. Oddly, not for all the songs; just data entered on a certain day or session; with more recent data preserved. And not all fields vanish every time. Ratings are never affected.
The first time this happened I chimed in on a thread about album art and track tags going missing because of a glitch with iTunes Match. So, I turned off Match. Disconnected from iCloud. And the problem happened twice since. Previous times, I re-entered the data and those tracks have not lost their data again. Only newer ones, but not all the newer ones.
This time, I hadn't even closed iTunes or logged out! So, my Mac appears to be playing some sort of prank on me! Confidence in my tagging efforts is suffers greatly:(
Anybody seen this, or know what I can do to stop it?

Answer 1

Airplay is a lossy process and must compress the display frame on the sending device in real time and transfer the compressed image to the AppleTV - it will adapt and give worse results with slower LAN speeds.
Bear in mind that if both the AppleTV and sending device are wireless they have to share available LAN bandwidth, whereas AppleTV playing from the internet may be the only active wifi connection.
So yes in theory having AppleTV on ethernet may well help.
It may not be the whole issue though.  You may be seeing a difference between your plasma and LCD TVs - I've always preferred the smooth look of plasmas whereas LCD these days tends to give razor sharp pics that could accentuate any pixellation artefcat by just looking sharper.  Are the TVs located in different areas, as if in same place the wifi characteristics for Airplay would be the same for both in theory (unless new TV causing interference and degrading wifi speed - maybe reposition AppleTV?).
Also some TVs have aggressive motion compensation features that whilst sounding good in theory can actually make some content look worse - have a play with your TV set settings.
AC