cx23885 HVR-1700 broken in v4l drivers vs standard kernel

Hi - apologies for posting twice, posted this as a reply rather than a new thread - doing well with mailing lists!

if I use stock kernel (Suse) 2.6.27.23-0.1 the card works, scans and plays DVB-T channels.
if I use the latest v4l drivers the card is recognised, and picked up, tune a channel, but cannot find any DVB-T channels.

I'm afraid I'm not sure what to look for there are quite a few structural changes to the code.

Thanks