I burned 3 data DVD-Rs the other day. Standard DVD-Rs that fit around 4.7 gigs. (I burned around 3.5 gigs on each)

The first two burned fine with a buffer level at about 90-100%. The third one the buffer level kept dipping to 50% most of the time, if not lower. Does this happen because it was the third DVD-R I burned in a row? Can anything bad happen if the buffer level goes too low?

This might sound like a noob question, but I really don't find myself burning multiple discs in row. Also, there weren't any other programs running in the background, and nothing that would have started up to check for updates or anything. I was using Nero 6