I had uploaded the photos for a given mission that included a building in it. I had inadvertently left the 'terrain' (rather than structure) option selected. Possibly as a result, the building edges all looked like they were melting, and there were few, if any, straight lines to be found.
It seemed there was no way for me to re-process the already uploaded images from that job, nor to duplicate the job once it had been flown. I ended up re-creating the mission, running part of it with the simulator, aborting, and then I was able to re-upload the images to try process the job as a structure instead.
(I know the structure feature is a beta and possibly won't be a polished product yet, but it will one day, and letting a client select the correct processing after they initially choose the wrong method will likely be quite useful).