issues with IVA -D310E or 300's are no multi region, picky on copied media.

310E saw new firmware which handled MP3 dvd's (yes 4.3Gb of mp3's) fully listed and sorted proper. The 300 firmware only allowed a limit of 250 - 256 titles to be displayed and it often carked it if it tried to play after that limit.

However... if you are fortunate enough and have access to the Alpine DVD firmware disc, many of your prayers will be answered.