Here's the link to the shootout article that mentions the HS2's chroma upsampling error issue. I assume that Panasonic DVD recorder models subsequent to the HS2 use similar playback circuitry and are subject to the same problem. This has nothing to do with the black level bug that Panasonic recorders used to suffer from (pre-E50). CUE affects PLAYBACK quality only and does not affect the quality of recordings so don't get too agitated about this.
I would appreciate knowing where I can see a spec sheet for the DMR-E100 on the internet. So far I have seen no mention of a TBC as a feature on the DMR-E100. Does anyone know if this feature is included on the DMR-E80?