[ubuntu] How to change autoplay settings for a Kindle?

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http://ubuntuforums.org – I hope that this is in the right section; if not, I apologize. My Ubuntu/Gnome *constantly* tries to open my Kindle in Rhythmbox- even sticking an invasive "OPEN THIS WITH RHYTHMBOX PLZ? :D" bar above every folder window I have it open in (this prevents me from alt-tabbing through the tabs I have open, i.e. when copying books.) It also tries to open RB when I attach the Kindle, and just generally makes my life a drudgery when I have the Kindle attached... I don't think that anyone *actually* uses Kindle with Rhythmbox, either, which makes it both annoying and inexplicable (I assum (Hardware)