C major Key Signature get lost in nightlies if exported from concert pitch in 1.3
Scores created in v1.2 lose key signatures when opened in 2.0 if 'Concert Pitch' was set when the 1.2 file was saved.
Steps to Reproduce:
1) Create a score in v1.2 that has a transposing instrument (like Trumpet or Horn), and another non-transposing instrument (like Piano). I have attached a sample score with this step done already.
2) Open the score in v2.0.
3) Go to the Notes menu and turn Concert Pitch off.
In the attached sample score, it should change the trumpet to 2 sharps. Instead, it changes all of the clefs to Treble clef.
Revision #: eec493e
Running on Ubuntu 12.04