What's wrong with Photoshop?

I am running PS CS on OSX Leopard. I use Photoshop pretty much daily, so it’s definitely something new happening. When I go to file browser and click on a folder, photoshop shuts down with an “unexpected” message. The only thing I can think of, is that I ran a bunch of recent software updates including the Leopard update. I would reinstall, but a friend that is MIA lately, has my disc.