Erm, I don't know if it is just me, but my TA works almost perfectly. Yah, I sometimes have to double tap my knob (FNARRRR sorry, couldn't resist) to change source back to player, but hey ho - I can cope with moving my hand occasionally.
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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