concert pitch change in score affects key signatures of linked parts
1. Create a score in C major with a flute and a Bb clarinet.
2. Create all parts
3. Switch to concert pitch.
4. Change to part of clarinet.
Although the part is not in concert pitch view, the key signature is C major as in the score (should be D major).
If you enter some music you can see that switching concert pitch in the score only affects notes in the score and not in the linked part. Key signatures, however, are changed in the part as well.
This might have been introduced when fixing #29616: Transpose leaves old key signatures in existing parts.
Using 4f11576 on Mac OS X 10.9.4