Preview will still open .pdf, but not .jpg. It happened suddenly, no rhyme or reason. I've checked the info on the .jpgs, there's no restriction on the permissions that should keep them from opening, and Preview is selected as the app to open them. I've tried trashing the .plist, repairing permissions, and restarting. No dice. I'm running 10.5.6, and haven't installed anything recently. Any wise readers out there have any idea what is going on?