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I'm disappointed as well, here in Italy we have waited one year to have siri and most of the time it just doesn't work. And it has a lot of problems with foreign words. Since i listen a lot of foreign songs, well...i'm kinda left selecting them with the music app...
Example (translated):

play tom waits
Answer: you don't have tobia guetto in your library.
-_-'
 
the voice in aussie is different to ios 5, I may have to restore with genuine build next Wednesday when it works.

My headphone remote doesn't work at the moment either, to start / stop tracks. I must look to see if there is a toggle in the settings.app for music
 
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