Quote:
Originally Posted by jhowell
Amazon designed a solution to that into KFX. Each KFX-format book has a list of KFX "features" that it makes use of. Since KFX is always delivered directly to devices and cannot be downloaded manually, Amazon's servers are able to verify that the firmware running on the device supports all of the features that the book uses. If it doesn't then a fallback format is delivered instead, either KF8 or MOBI7.
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I didn't know that. Is there a potential issue if someone used the KFX plugin to create KFX and loads a KFX that's not fully compatible with the firmware on the Kindle?