Cannot read DVD+R with GWA 4080M firmware AA26 (macbook pro 1.1)

Hi everybody,
I have a macbook pro 1.1 with a drive GWA 4080M (firmware AA26). Since a few weeks I cannot read anymore some DVD+R (Sony DVD+R media code D21).
1) One of these media burned with my other macbook pro (2.2 drive Matshita UJ-857D firmware KCVB) using the finder (so ISO9660,joliet,UDF and mode 1, booktype DVD-ROM) cannot be read on the MBP 1.1 - The same DVD is properly read on other mac or PC even on my old dell PC of 2003). I used the finder to burn it.
2) The very same media burn (data), burned using the finder as well, are read if burned by an other burner (Mac quad core, with SONY DVD RW DW-D150G). The disk seems to be similar (ISO9660,joliet,UDF, mode 1, booktype to DVD-ROM).
Actually the bitsetting (I learn what it was from wikipedia yesterday) seems to be done by default on mac (both of the burner).
3) A DVD+R (still same media) is burned properly on the MBP 1.1 with GWA 4080M drive, and readable everywhere.
4) The Matshita UJ-857D has not received the superdrive 2.1 update (if applicable, that seems to triggers problems). I experience no problem in burning or reading with this drive except this one.
I tried to reset the I repaired the permissions (there was nothing to be done anyway), I also reset PRAM and NVRAM (http://docs.info.apple.com/article.html?artnum=2238)
and SMC
(http://docs.info.apple.com/article.html?artnum=303319)
and it did not helps
Last point the problem is the same under windows (bootcamp) and mac!
I would be very grateful if someone has a suggestion to fix or at least!
Thank you in advance

my same problem..
how come we can't get an answer on this?

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