Stating that you are using Maxell DVD+R 8X 4.7GB media does not actually provide information on the quality of the DVD media you are using. Maxell, like numerous other marketers of DVD media do not actually manufacture DVD media. They mass bulk purchase DVD media from various DVD media manufactures and then package the media and stamp their name on the package. Some of these DVD Media manufactures are located in off the wall third world countries and the quality of their media is suspect. The only way to truly know the quality of the Maxell media is identify the DVD media by the MID (Manufacture ID and media code) (Example:TYG02).
To obtain the MID (Manufacture ID and media code) of DVD media use a utility software program similar to DVD Identifier (http://dvd.identifier.cdfreaks.com), DVDInfo (http://www.dvdinfopro.com), and/or Nero Info Tool (http://www.cdspeed2000.com/files/NeroInfoTool_301.zip).
As explained above Maxell DVD media can be manufacture by various DVD media manufactures, some of which are located in third world counties. It should be noted that some Maxell DVD media is very suspect in quality.
As suggested in my original posting in this thread visit the CD Freaks Blank Media Forum (http://club.cdfreaks.com/forumdisplay.php?f=33) to obtain information on obtaining known high quality blank DVD media.