@barsanuphe: I started by actually dealing with the peculiarities of the incremental setting of the Calibre plugin (which basically only puts modified collections in the json db instead of the full set), but I did indeed wonder if it could be made more general... I'll check it out tomorrow
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Completely unrelated: I'm testing on a Touch, so I can attest that it works on earlier devices. It's up to date so on FW 5.3, but, OTOH, nothing ground-breaking happened on that front in that FW, so it should be okay on 5.0/5.1/5.2...
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