SmarSquid wrote:
if I unplug my CD-RW I can get the DVD+R to burn just fine. Plug the
CD-RW back in and wham! the problem returns like clockwork.

And can we assume that the CD-RW motor was not running during failure?
Does the CD-RW housing feel hot? I can't believe that the CD-RW circuit
board would use much power.

My setup is very basic, and I find it really hard to believe that I am
pushing or exceeding the limits of a 350-watt power supply.

I tend to agree. I believe your graphics card doesn't have a fan, so I
guess it doesn't use much power. I would guess you have a good 50W to
spare. It would be good to add up the power specs of your components to
be sure. Try something like this: http://takaman.jp/D/?english Also
amd.com has some literature on calculating power requirements.

Do you have the IDE jumpers set correctly on your optical drives?