I have a team of 4 designers all contributing Illustrator files to a library of graphics. When I few the library in Bridge, some of the files are generating previews, but some are not. What setting(s) would keep a preview from being made? Some of us are using CS6, some CS5. Files are being saved as CS5 so the CS5 users won't encounter issues when opening. Some files have multiple artboards, but the lack of preview does not coincide with having more than one artboard.
Below is a screenshot of what I'm seeing...
