Extra initial clef in scores imported from 2.x
1) create a score in 2.x using two or more staves (or download the attached)
2) load it into 3.0
Result: all staves after the first show an extra clef after the header
Workaround - you can delete them and re-save and they stay deleted.
(BTW, I'd have called this "normal" instead of "major" if that were available, but it's more than "minor")