I am also disappointed that you cant do any downloading while doing f@h and playing a standard dvd - both things cause background d/l's to pause for me (even though I updated to 1.6 firmware straight away)
I can appreciate blu-ray playback causing this, but f@h is meant to take only the "spare" capacity rather than actually stop it working completely I thought, and I wouldnt have thought dvd playback to be too taxing either - but hey ho