Description of problem: When saving in JPEG format, if the quality selector is at 100% then sometimes it fails. Version-Release number of selected component (if applicable): gimp-2.2.2-0.fc3.1 How reproducible: Not sure, but it happens often enough to be annoying.
Created attachment 109775 [details] example image It happens 100% with this image. Load the image. Save As... Select 100% quality
With high quality settings and high detail images, saving as a 100% jpeg can lead to the EXIF plus thumbnail marker getting longer than 65533 (sanity limit by libjpeg). The soon to be released gimp-2.2.2-0.fc3.2 package contains a patch that decreases the thumbnail quality in 5% steps until the marker fits.