What media are you using, though, Kenneth? I note that lens cleaning has worked for you in the past according to some of your other posts.
The trouble with "media" is that even the same brand/specification doesn't necessarily come out of the same factory, or even from the same country.
http://www.digitalfaq.com/reviews/dvd-media.htm provides a useful overview. For what it is worth the disks that Apple themselves sell under their own brand name as I understand it are made by Mitsubishi (who also make "Verbatim" discs) and Maxell (owned by Hitachi). I've never tried Maxell, but Verbatim have certainly been very reliable for me when used used in Apple drives.
I avoid Memorex like the plague after way too many bad experiences and observations of complaints by others and have found Sony to be very variable, depending on which particular factory they come out of. In Australia TDK are usually very good, too, but over here they all seem to come out of the same factory, with a "TTH02" code, while in other places this seems not to be so.
One of the differences between the drive in an MBP and the drive in your old PB is that the MBP drive is probably trying to do things faster, and with more difficult media, than the PB one was. Only the very last of the PB's optical drives (released in late 2005) could burn DL discs for example, and the MBP drives try to do it at significantly faster speeds, despite using much the same error/dust/ smoke/dirty disc/ bad media prone optical technology as their predescessors.
For what it is worth I've yet to burn a single coaster at all with the drive in my MBP 13 over the last three months (probably burning on average at least one DVD a day on Verbatim or TDK media) , so maybe they are actually getting better at it!
Cheers
Rod