iTunes suddenly decided my mp3s are mpga movies that iTunes won't play. What happened? I have a bunch of music I ripped from CD myself. I haven't played all of it recently, mostly listening to my iPhone instead. I went to play some old tracks only to be told by iTunes "this movie requires QuickTime, which is not supported by this version of iTunes".


It's not a movie.
It's not like I changed anything. (Might have upgraded iTunes.)
Other tracks off the same CD are still playable.
Why doesn't iTunes support QuickTime?


Have you run into this? How would I get around it, short of re-ripping all those CDs? And is there a way to determine which tracks have been affected short of trying to play every one of my thousands of songs?
Here's a workaround, which also makes no sense: as explained at this link, switch iTunes to run in 32 bit mode via the Info box.

This doesn't explain parts 1-4, but it does at least make the tracks playable. I'd still love to know what is actually going on.

Also, you can enable the "Kind" column and sort by it to discover which of your tracks have mysteriously been converted to Quicktime Movies.