bd5f56c created the issue

Hi yesterday I upgraded to Cyberduck 4.2.2 and found a bug.
Every time I try to close Cyberduck from File-> Exit I got error message- "The application Cyberduck has recently crashed. To help
improve it, you can send the crash log to the author."

but this problem won't happen if you use the windows close button.

here is a screenshot: http://ge.tt/9NirXOU/v/0