i've lost the feature that allows me to double click on a file (or even an iCal events and to do) to open it without having to open the app. could it be that i downloaded an online app (blurb.com)? but i think it started a couple of days before that. for example, even when i open acrobat reader app, and go to file, open, the jpg files (and others) are grayed out and not available. the only way i can do it is to click on the file name or icon and do "command / o". how do i get my files to open by just double clicking?