The first attachment shows one of my folders as displayed by the windows 10 file explorer.
In all cases, the icon that the file explorer puts in front of each file is the same as the icon that appears if I right click on the file and select "properties".
For example right clicking on the first file ("01 Turing.mp3") yields the properties window shown in the 2nd attachment.
The last attachment shows the same folder as displayed by MC. Note that the icons placed in front of each file is the same as what the file explorer uses for all files except the .mp3 files and the .ico file.
In the case of the ico file, MC is a bit smarter about the icon. File explorer merely shows the icon of the application associated with the ico extension whereas MC actually uses the contents of the file for the icon. Personally I wouldn't care that much about either choice, although MC's icon choice is probably better.
However in the case of the mp3 file, MC uses some other icon that does not seem appropriate at all. The icon that appears does not belong to the application that is associated with mp3 files (foobar2000) nor is it the icon that shows up in the property window. This is distressing, since I use mp3 files A LOT.
By the way, I used an application called "MP3ext" to modify the icons for mp3 files and perhaps that is related to the problem. Evidently it modifies the icons in a way that is acceptable to the property window as well as to the windows file explorer ... but it seems to throw MC for a loop. I probably could get rid of the inconsistency by removing MP3ext ... but on the other hand the icon themes used by MP3ext are really nice!
~Paul