I have a Pioneer 106D for more than a year and had no problems burning + or -R's until I used PRINTCO printable DVD-R's. This media is not good enough for the 106D. However, the Printco Disks do work in my 106D, my DVD player, my 109's but will not read in a LITEON, LG and some other drives.
When I changed the DVD media to Ritek G05 problems seem to go. The LITEON drive is still problematic.
Now when it comes to DVD-RW, that's where I have problems; whereas DVD+RW I have no problems? Now I've just updated the firmware on the 106D and on the 109's.