Man, I just noticed that multi-selecting a bunch of files doesn't even allow a batch operation in the properties dialog. Oh no.

This is something that is present in a lot of other software, and even in something as simple as Apple's iTunes is handled without a problem. Selecting multiple tunes would grey-out any items that were not common between them. Changing anything that is already common would change that for all the files, and changing anything that wasn't common (over-riding the grey-out) would tell you that you are about to affect all files, but still allow it if you wanted to do it.

Right now for some things, I'm tempted to delete them off the player, make some batch adjustments to the MP3 files, and then resync them.