Sounds like you're not alone: .
Also found the following on DVDplusRW.org
"If you encounter reading problems with the Pioneer DVD 116-R or RW, make sure that the disc is full for about 1/12th of the capacity (also known as "30 milimeter compatibility mode"), i.e contains at least 5 minutes recorded in HQ mode, 10 minutes SP, 15 minutes LP or 20 minutes EP mode. Some DVD-ROM drives need a disc to contain a certain amount of video to allow laser power calibration to function correctly."
Wish I could help more... brad

