There is a very long-standing (since 2011) OSX bug where sometimes the filename metadata for HFS+ filesystems will get corrupted, resulting in some APIs returning one case for a file, and other APIs returning another. The result is that sometimes, for no visible reason to the user, fsevents would simply not work. As of rb-fsevent 0.9.5 this issue is properly detected and an insanely hacky (but eff