What is the difference between DVD-R and DVD+R? My JVC DR-MV1 DVD Recorder & VCR combi can only record to DVD-R and it says in the guide that when DVD-R recorded on the JVC DR-MV1 and played on another DVD player there maybe drops in picture and audio quality. I have found this to be true. Do you think this is down to the JVC DR-MV1 or is it just something which happens with DVD-R? If so are DVD+R better then?