After ripping quite a few CD's with my regular setup, a multi-encoder with 2 or 3 codecs (2xAAC and for some 1 ALAC), I just discovered that there was quite a few folders extra.
It seems in the main dialog, after selecting "Multi Encoder", whatever is selected under Path, now gets a new folder for each CD, with just the Folder.jpg in it.
This is quite unexpected, as I used to only get the Folder.jpg in each of the encoders' output dirs. (It's there also, so I now get one Folder.jpg for each encoder in my Multi Encoder setup + one extra ...

Maybe some setting somewhere changed back when I reset everthing due to a bug in the beta? Or might it be a bug?