I can reproduce this here (see screenshot), confirming. The issue is that the pixel size of the jpg is not a multiple of 8. This makes lossless jpg rotation impossible, but eog is not smart enough to do something about it. gThumb will give you a warning message and gives you the option to truncate the image to the next multiple of 8.
** Attachment added: "screenshot original buggy rotated.png" http://launchpadlibrarian.net/36230495/screenshot%20original%20buggy%20rotated.png -- rotating a jpg photo (eg "CTRL+R"), then saving it (eg "CTRL+S"), moves a few lines or columns of pixels from one end to the opposite https://bugs.launchpad.net/bugs/486862 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs