This may not be a bug, but I thought I would get input from you guys:
So, if there is a folder C:\Metallica
even if you type C:\meallica or C:\meTallica
the directory will still display because being case specific is not required when you manually type the directory address inside Mp3tag.
In other words, you do not have to type case-specific C:\Metallica to get the contents to display.
However, your Action commands will go off of what you TYPED.
So if you have an Action command to assign Artist from FOLDER NAME... it will be assigned as what you typed, so if you typed meTalLica, that's what would be assigned, not the actual name of the folder Metallica.
As I said, not a bug probably but I just thought I would get your input about the way Action commands work.