Over the years I have burned many CD-Rs on several different Lite-on CR-RW drives. I have used 10 or 12 different manufacturer's CD-Rs.
I have a Benq 1620, and experience similar problems, both with reading and writing CD-R's, yet the drive works perfectly otherwise.
Let's see what other people say to this?
Found that to be true with the BenQ and other cd-burners. That's why I now have my Samsung CD-RW/DVD Combo drive in the external enclosure. I had some GQ and Memorex CD-R's that wouldn't read properly in the BenQ/NEC ND2500A and 3500AG but yet read back beautifully in the Samsung. I don't think DVD Burners just have that large of a supported media code list for cd's in general as it's not their top priority. I'd keep an external USB capable cd-burner for those times or get a cdrw/dvd combo in for the second drive to your dvd burner. I can still burn up to 52x (not that I go that fast unless I goof up and I have already!) when I really need to do so even in the external enclosure.
like what braxas said....
try using a cd-dvd combo for reading...btw..liteon drives are good readers....they read even those badly burn disc......thats why for ripping...i use only LiteOn...Best rippers...:D:D