Note spacing not accounting for accidental brackets
My config: MuseScore f3f334f on Xubuntu 14.10. Results below are obtained with defaults settings (and so the default font).
Accidentals with brackets are not placed correctly:
Without brackets, for comparison:
There's not enough spacing before the opening bracket, so it touches the previous note.
Also, the distance between the accidental and the closing bracket is not always consistent. For example, see the double sharp in brackets. It seems a little bit shifted left compared to the sharp in brackets. Also, compare the flat in brackets with the double flat in brackets: