SONY DVD RW DW-U10A Won't read Double Layer DVDs since 10.4.9

Folks
Been browsing for an answer to this problem, and it seems these SONY DVD RW DW-U10A — for a start — are not very reliable, but I also notice quite a few stating they have had problems since upgrading to 10.4.9.
I am trying to re-install my FCP Studio after a crash on my G5, now it SEEMS my SONY DVD RW DW-U10A won't recognize the disks that are double-layer.
I don't want to go off buying a new drive if the problem is in 10.4.9 — and if Apple are going to remedy the 10.4.9 problem.
Any help from anyone?
Regards
Roy

Folks
Further to this — tried to install (as an experiment) on my iMac, which has a Pioneer Drive, and it reads the disks okay — with 10.4.9!
So.......?????
Roy

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SONY DVD RW DW-U10A Won't read Double Layer DVDs since 10.4.9

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