Copy will crash Emacs every time when switching to
another app. The steps I used are:
1) Type any text after startup.
2) Select text with mouse.
3) Use either Command-C or "Copy" menu item.
4) Switch to another app, in my case TextEdit.
Emacs then either crashes or hangs for me, every time.
I can still paste the text at that point, so at least
it made it that far...
I'm running Jaguar 10.2.2 with all the latest patches.