This post appears to describe similar symptoms, but no resolution. Could this one be connected? Probably not, as andy successfully downgraded to 1.03 and got the player running, and it didn't help you.
Here Hugo offers some advice which may be useful, although it looks like it will gub your volume settings, current visual etc, but must be worth a try.
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Rory
MkIIa, blue lit buttons, memory upgrade, 1Tb in Subaru Forester STi
MkII, 240Gb in Mark Lord dock
MkII, 80Gb SSD in dock