Hm,
I'm using the newest version of calibre and I only used 2.5.0. I just had a look at the KoboTouch-Plugin-configuration and there the option "Upload covers for books" is checked. Could have been me a few weeks ago when I played with the plugin-configuration...
Might this be the cause of the extra book covers in the main memory?
Cheers, Joachim
PS: I'll try it...
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