I have, for example, a track who's filename is ...
\\Files\Music\[Fiction]\The Chronicles of Narnia #1 - The Lion, the Witch and the Wardrobe\001.Forward.flac
Having installed MC17 last night and then done a little messing around with some track names I tried using Rename, Move, & Copy Files and was surprised to see that even with no changes on such tracks, MC intended to rename them to as ...
\\Files\Music\[Fiction]\The Chronicles of Narnia #1 - The Lion, the Witch and the Wa\001.Forward.flac
The rdrobe at the end of the (longish) directory name had been chopped off.
This is actually sort of dire. If I were to update some track names and then do a huge "please rename all the tracks correctly" as is my wont (MC having demonstrated over time that it bascially never screws up and does something random) now suddenly I'm scared that things will go wonky. Ihave other music systems (Sonos, for example, and some other links) so unintended file renames are a big scary. I suspect they might also mess up the next backup pass (suddenly lots of "new" songs and lots of extraneous data).
For now I had to go back to 16.