Power Mac - Upgrade DVD problem

Running a Pre-Intel G5. Upgraded to 10.4.10 from 10.3. When to burn a DVD. Put 4 gigs on the DVD and when I went to burn it, the Mac said too much stuff was on the disk, which it wasn't. Tried 3 gigs and it burned just fine.

Tried to burn another disk. Same problem. This time, even with a 10 meg file it says my DVD is too full. Also I noticed that in my finder I see all my failed attempts at burning even though I've dumped them in the trash and emtpyed it. (See pic) If I click on these, it say "Volume for "Untitled CD" cannot be found."

I can't burn DVD's anymore. Help please!

Thanks

Jeff

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