Not sure if anybody having the same problem. My aopen 1648/aap DVD rom can not read most of the dvd-r I burned. These DVD-R's are read OK by all other DVD rom, burner, player I have.
what firmware version is on your drive.? the latest firmware for 1648/AAP is 1.07 and the latest for the 1648/AAP Pro is 1.01
It is 1.07. And btw, It read OK with all DVD+R's and a few DVD-R's I burned.