I installed MusicBee 3.0 last night. It was complaining that it couldn't find any of the MP3 files. On that machine, all of the music (but not the database) reside in M: which is mapped to a remote Windows machine. That hasn't changed. I haven't upgraded MusicBee on my other machine (the one with the share hosting those MP3 files) as I'm concerted the same thing will happen there. Strangely, if you tell MusicBee to not look for missing music files, it plays those MP3 just fine.
What's going on? Do I need to be concerned?