I got a message that “Picasa was unable to find a default handler for that file.” What happened?
You may get this message if you ask to open a file (usually a picture) with your native Linux program and Picasa can’t figure out what program to use. Again, because there’s no standard way to do this on Linux, Picasa just does its best to figure it out; if it can’t, it will present you with this dialog box. Q: Hey! I have a bunch of movie files that Picasa skipped. Picasa for Linux does not support movie files. The program will not attempt to find or play movies. (Note: under Options > File Types, the Movies checkbox is visible but not functional.) Q: I used File / Add Folder, but it didn’t work. In the Folder Manager, clicking on a folder and the OK does nothing unless you also click on an action, e.g. Remove, Scan Once, or Scan Always. Q: When I import photos from my camera, I don’t get any of of the EXIF data my camera stores! If your camera uses the PTP photo protocol, Picasa’s import feature does not preserve the EXIF data created by the camera. If you need to import your photos
