SDO is performing several instrument calibration maneuvers today. During these maneuvers the AIA boresight is being moved away from the center of the Sun. When the images are re-centered some of them have lines to the edges of the picture (such as we see in this 211 image). It appears that the re-centering of the images is copying the value at the edge of the field of view rather than zero while the image is being shifted to the center of the picture.
This will affect the rapid images shown on the SDO website and the LMSAL Sun Today website but will be corrected in the science database. However, information that is missing from images because the instrument is not pointed at the Sun cannot be recovered.
