Abalone, I did not try this with the original 1213S firmware as I'm also burning DVD's and get better results with the BS41R firmware (and when are they going to release updated original firmware for the 1213S!). I was holding off on the CS09/CS0C since the BS41R is working so well with my current DVD+R's.
Please, this was the first disk which showed a green bar like that on the Sony burn - the rest have all been clean and in all cases KProbe is reporting 0 C2 errors (even the one with the green bar) while the LiteOn burns are reporting a number of C2 errors and many more C1 errors. I think the green bar is an aberration but I'll know more when we play the VCD's.
Thanks for the replies.