Buffer underuns can cause errors that make you
slow your recorders speed down to try and correct but here's a list of things you might try first,
click
http://www.roxio.com/en/support/cdr/bufunder.html
My friend in Georgia makes CD+G backup copies
at 16X write speed and he often gets the type of graphic problems George describes.
I'm writing CD+G's at 12X speed, the recorders maximum, with absolutely no errors. Burnproof technology, a defragged harddrive, lots of storage for temp files, clean unscratched original disks, all these things will keep me making clean copies at twice the average guys speed.
Take care,
Mike G.