My DVD-Rom that used to read DVD-Rs (quirkily) now won't read any!

It will still read DVD-ROMs and CDs (also CDR & CDRW) but now won't read any DVD-R - the Samsung site lists it as supporting DVD-R.

I downloaded and ran the F306 firmware update - which it already had - and still no joy.

I checked the Nero info tool and it lists the drive as not supporting DVD-R.

Anyone any more ideas?

Thanks