Problems notating nested tuplets

Segv

I have not been able to figure out how to get nested tuplets to display properly.  Here's what I tried:  In a 4/4 bar, I added two quarter notes, three eights, and two more quarters.  Then I marked the eighths as a triplet, and lastly (via the special tuple menu) marked the entire set as being a 5:4 tuplet.  I think (from playing back) that it did this, but the notation shows (from left to right):
4/5   4/5   (large 5)   4/5   4/5
Those show above each of the elements I described above.

I am really in trouble if I cannot notate such things.  Is this a bug, or am I doing this wrong?  Thanks.