I do not know if this has been reported before,
The problem is when recording and watching another channel at the same time through 2 connections, if I change channel when the show is being recorded on the other channel, the recording stops and I get only like 5 min out of 1 hour show. So basically the Z10 does not really record while watching another channel. However my Z8 is not affected at all by this behaviour since I can change channel anytime while recording on another channel...