The "Please Wait..." dialog is sometimes blocking background operations from proceeding.
I'm in the process of reripping some of my CDs from MP3 to FLAC. I'm using
Alex B's technique of copying the FLAC files over the MP3 files. In the last step of the process I do an additional "Update tags from library" to get the cover art written to the tags of the new files (I store cover art in the tags). It is during that last step with cover art getting written to the files that the "Please Wait..." dialog will sometimes block.
I'm playing music in the background while doing this. I'm doing about 10 CDs at a time. The "Please Wait..." dialog will sometimes stop music playback during its operation (particularly if the music finishes one track and starts another while the Please Wait dialog is displayed).
I've also noticed other bad behavior of the "Please Wait..." dialog during other long operations. Sometimes it will end up behind the MC window and MC will appear hung with a wait cursor. In reality the "Please Wait..." dialog is hiding behind MC and the wait cursor goes away when the operation is done.
I hope that all makes sense.
I'm using MC 13.0.169