Fixed in 1403

I see the same. If you check/uncheck it you can remove it again. Added as: http://www.ventismedia.com/mantis/view.php?id=8087

Also, this doesn't stay checked, and even though it is unchecked it still shows whether it is checked or not.

Nyn

Reproduced here.

This is a new feature of MM4 that I bumped into and I like it. In the newly named Art and Details pane you can select ID3 attribute fields to display.

Unfortunately "(Date) Added" doesn't show the date but some fixed text "<(Date) Added>:<(Date) Added>".