i do not think that this k3b bug is related to a specific hardware but to a software bug. I have the exact same problem: k3B either quits with the generic "write error" or produces a corrupt disc. This is in kubuntu 8.04 and happends with a NEC ide burner and also with a LiteOn SATA burner.
I have installed in wine a programm called IMGBURN and it works without any problems (at least there is no need to switch operating systems just to burn a CD).
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