EX5100 PVR playback problem

[888]

Hi all...........
I have a slight problem in the playback of recorded programmes.
My tv is 4:3 so I've set the Eurovox to be 4:3 and letterbox format, which is fine when I'm watching live programmes - normal progs show as full screen, and progs broadcast widescreen show up in letterbox format.
When I record WS progs the replay changes to full screen cropped. I've tried changing the "aspect" during playback but that has no effect, and I've tried all the different settings in the menu but cant get it to playback in Letterbox format.
Any ideas?
cheers
apart from this problem, and an out of sync problem that lasts a few seconds on playback its a great box.