Shift+<letter> enters wrong enharmonic spelling if accidental is in effect

Windows 7, GIT commit: d26a8df

1) new score, flute, C major, 4/4
2) measure 1, note entry
3) D, Up, F, Shift+D

Result: last note is entered as Eb
Expected result: it is entered as D# (displayed as D, but D# still in effect from first note)