When key signatures are add to a concert pitch score the transposed parts can have incorrect key signatures.

See http://www.musescore.org/en/node/3688#comment-9108

It only changes the key signatures for the first instrument. Key signatures mid-way through the piece for other instruments do not change.

See http://musescore.org/node/4164

Transpose by interval works correctly for scores with multiple key signatures. However the transpose by key signature behaves differently than I would expect.

1. Open nightingale.mscz
2. Edit > Select All
3. Notes > Transpose
4. Choose "F major / D minor"
5. Mark the "Transpose key signatures" checkbox

Expected behavior: Since the first key signature is Eb major, all notes and key signatures should transpose up by a major second.

Actual behavior: The first key signature transposes up a major second as expected. The second key signature transposes down a major second (from G major to F major).

Discussion: Although the current behavior is logical (change all key signatures to F major) it is less useful and somewhat unexpected for the following reasons:

• Consider a typical use case: a song is slightly too low for a singer so I what to transpose from Eb major to F major. I expect that the whole score is now a major second higher but actually one section is now lower).
• Most music prepares for a key change with a specific sequence of chords. These chords will now seem out of place since the whole piece is in the same key
• Sibelius follows the expected behavior I outlined above

(Tested using r. 2701 nightly, Windows XP)