I just updated a site to WP 3.7.1, and now have random image files showing errors. The affected files are not appearing on the site or in the media library -- just the title appears. If clicked, it appears to be a broken link. If the exact image link is put into the address bar, I receive the error message "The image "http://www.mydomain.com/wp-content/uploads/2013/02/photoname.jpg" cannot be displayed because it contains errors.
This has happened to approximately one out of every thirty photo files (all jpegs). I have not discovered any other file types affected (yet -- have not gone through the entire library).
What could be causing this??? Thanks!!