This conversation really needs to take place on Alf's website, but I'll try:
@Mike L. The plugin doesn't do any conversion. It never did (with the exception of Topaz). It just changes the file's extension. What you are experiencing is the result of Amazon's KF8 format becoming more and more prolific. A KF8 ebook (DRMed or UnDRMed) is not going to be readable by any device/app that doesn't support KF8 (.AZW3).
If you don't "end up" with a .mobi, that's because it was never a mobi to begin with (regardless of the file's Amazon extension). It was a KF8 (or possibly topaz) ebook and will have to be converted to the older mobi format to be readable on devices/apps that don't support KF8.
In short: everything is behaving as expected. It's just that many people aren't quite hip to the changes that the shift toward KF8 has introduced to a lot of people's existing workflows.
Last edited by DiapDealer; 10-24-2012 at 01:25 PM.