I downloaded an app called Cyberduck, and put it in my Applications folder, as you normally would. But when I open it, it immediately closes again. What's weird is if I put the file in any other folder (Desktop, Downloads, etc) and open it, it opens fine, stays open, and works great. If I put it back in my Applications folder, problem returns. This has happened with a few versions of Cyberduck, in a few different 10.6.x versions of OS X, and both on my old iMac and new MBP. I've never seen this with any other program. Any ideas?