1.1 r4846 Measure insert corrupts key changes
Using MS 1.1 R4846 (full compile, factory reset, win7 32-bit)
In the sample score provided I have two key changes. If you insert measures *from the first measure* it corrupts the key changes. See this example of a measure insertion:
Bar 16 already shows accidentals because the key change is now in bar 16 even though it doesn't show the key sig. The more bars you insert from the first measure, the worse the results. If you insert from the second measure, it's OK.