@Baal,
Firmware is the program in a computer "chip" called an EPROM. You'd have to change out that chip (it pops out of its socket with a screwdriver.) It's also possible to download firmware to a special kind of EPROM, so you wouldn't have to change the chip. Whether that technology is involved here, I don't know.
So they're speculating that the error you saw
might be from a bug which
might have been fixed in the latest firmware.
It's possible that your cd burner has an older program than the one they let you know about even if you bought your computer after the latest firmware date.
In other words, if your cd burner is giving you grief, changing that chip might solve it. I would lean toward don't bother unless the problem with the cd burner is worth the effort.
If you want to change it, you might want to have a computer technician do it. If you want to do it, you can, but you have to make sure you're grounded when you change it... a static discharge like the little zap you get when you walk across a carpet and touch a doorknob: that can destroy an EPROM.