Piano Ed doesn't crash on Mac when editing score produced elsewhere

For the second time in a couple of months, I have used the piano roll editor on my Mac without it crashing. In both cases, the new factor was that I was editing someone else's score, i.e., one not created on the Macintosh. I realize that this hardly gives a path to how to debug this, but the inability to use the piano editor to articulate my scores is one of the most annoying and persistent (and non-getaround-able) bugs in this product, and I hope that this gives some insight. You might try comparing two wholly new identical scores created on Windows and OS X byte-for-byte.