Recording Quality - Can left channel be heard on right channel (or just a U3 problem)

[kelmorn]

I currently own a U3, a brilliant player but it did have one problem. When recording line-in, there was a slight cross over between channels.
ie You could very slighty hear left side stuff on the right side, and very slighty hear right hand side side stuff on the left channel.

It was probably noticed by very few, but I use the U3 for recording the output of Bat Detectors (the little flying mammals, not sports type). Bat detectors output two types of signal for analysis, Heterodyne and Frequency Division, one to the left and one to the right. Studying sonograms its apparent that sound was 'crossing over'. Not a disaster, and it didn't make me go out and by a specialist recorder.
It was something to take into account when buying my next audio player (with line-in recording)

So, I now want update my audio player. Loving the U3, I'd like to get the Iaudio7 with a much larger memory that should allow me to record for longer.
Could someone with the interest or time check if this problem occurs in the Iaudio7. Its easy to do, play an audio file, with software like audacity, mute one channel and record the output to a Iaudio7. Then play the file recorded with the Iaudio7 back in Audacity on see if the sound is only on one side.

If anyone can do that for me.

This might be discussed somewhere else, but does anyone know how long the Iaudio7 will record for (before battery goes flat)