Just installed Leopard, now can't burn Double Layer DVD +R

[Sinsemilla]

Just installed Leopard, now it won't burn Double Layer DVD +R discs anymore. I've tried in both Toast 8.03 and Disk Utility and both will get to around 60% then tell me there's an error and then just stop and spits out my disc. Anyone else have this same problem? It burned fine in Tiger 10.4.

I'm using an Apple Mac Dual G5 with a DVR-109 burner.