I suspect that this is an issue with 'machine control', in other words
being able to start the camcorder via the DVD recorder controls - the
basic DV data stream should be OK.

Thanks to all for the replies.

I've now connected via firewire, and it works OK, including the
camcorder controls.

Slight snag is, the recorded DVD seems a bit "jumpy" at times, as if
it has dropped frames, even when recorded at high quality (1 hours
worth on a DVD). Is this because I am burning to a DVD RW, with a 4x
write speed?

Would I get round this by using a 16x DVD R ?