Hi Tim,
I can't think of others off the top of my head (I don't personally do any Music XML exports for my own use), but the software should tell you (as it did in the instance of the lyrics) if there will be any issues you need to address. The Music XML format is a "work in progress" that tries to bridge file formats from many different music programs, and so there will likely always be something that needs tweaking in the target program, but the good news is that it's getting better all the time.
If you find any problems with the exports, please do let us know. You can either post them here in the forum, or send them directly to the Helpdesk at
support@notation.com
Thanks!
Sherry