Thanks Dan, your confirmation is quite helpful. Yes, Musescore seems to handle the XML much better.

I'm not sure what the small '+' characters above the staves mean in Musescore. They occur only during the 3/4 time signature. At what bar did you introduce the key change?

I looked through all of the Display options for the differently shaded chords, but couldn't find anything that matched. Suffice to say, it doesn't work properly.

Thanks again for your input.

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