I am using Gutsy on two laptops, a Dell Latitude D400, with a DVD-CDRW drive detected as "HL-DT-ST_RW.DVD_GCC-4241N-0:0", and a Gateway MX6427 using a Phillips DVD+-RW SDVD8441.
When trying to burn a CD ISO to the former or a DVD iso to the latter using respective RW media, gutsy complains that the disk is not writable and ejects the disk. The disks do have data already on them and under feisty I would normally get a 'erase disk?' dialog. I have tried using the default nautilus burning tool as well as Brasero, both resulting in the same.
Trying to manually erase the disk using Brasero on the Gateway, it tells me that the disk is a DVD-R and that it cannot be blanked.
I was successfully able to wipe and burn the disk using Nero. I did not try K3B.
Brasero worked fine using an external USB dvd burner, when the internal drive refused to even acknowledge that I had placed a DVD-R into the drive.