Thanks for your feedback. I know my response was probably a little heavy handed but honestly, I've been on the other end in support and when my colleagues have screwed up like this and totally not excercised due dilligence, our management would be seriously upset - even to the point of reprimand. The 2 goals of my message to them were to 1) Realize how upsetting this is to customers and that it is not acceptable and 2) Fill in any gaps in the information thread. If they missed #2, then that is another area where they need to improve.
I think that many of these companies nowadays view support as a $$$ pit and as long as sales are going well, then they can let support suffer. Plus, for some specifc needs, Toast is the only game in town so they are not as compelled to do a good job of supporting thier customers and frankly, it's just not acceptable. If we don't speak, who will?
To your points, I don't think an OS re-install would help because the only thing that changed was going to 10.4.9 - and if it can't operate with that, then it's still a show stopper. Plus if something like Roxio requires or causes a full OS install, then there is a bigger issue somewhere. OSX is known for many things one of which is the need NOT to have to re-install every 6 months like I did back in the WinXP days. Also, I tried the Superdrive but Roxio won't recognize Verbatim (best in town) dual-layer media in the Superdrive.
As to a fix in Toast v8 - already went there and actually, you are the one who pointed it out to me. There is another post in the Toast 8 forum of a user experiencing the EXACT same issue. I currently work as a software test engineer and while I don't claim to be 100% infallible in terms of code troubleshooting, I am pretty sure this is something systemic in the code base common between v7 and v8. Again, I pointed Roxio support to this post for several reasons one of which was so that they would have a quick link to a repository of all of this valuable information - the point was missed on them I guess.
So the real reason for me coming back to this post was to let the community know that based upon my needs, OSX Disk Utility will probably suffice and also another product, DVD Copy for Mac, is out there for $49 and it seems to work really well. I have no idea how their support is but the product works. Check it out at http://www.soft29.com/mac_dvd_burner_software.html.
Good luck...and thanks again for your help.