I've just released Mp3tag v2.67
I had to remove this version because of an error that is not an easy fix. Besides the changes that were listed in the changelog, I was working on making the internal libraries more agnostic to the operating system they're running on -- which resulted in major restructuring.
While most of the affected code is covered by unit tests, it seems that my test base can still be extended
For those of you who where fast enough to get the v2.67 release, I suggest to install v2.66 again. Sorry for the inconvenience and thanks for your patience!