The National Post put up a news article about user centered design in cars, which turned out to be an ad. I took screen caps of this offending article and wrote about it. The image file name I used included the snippet “-ad-“, which was enough for my ad-block plus browser plugin to remove it from my view. Only after renaming the file name and reuploading it could I actually see the ad. Lesson learned.
It was somewhat confusing. I have uploaded a lot of images, in a standard way, to WordPress, without issue. This time the image uploaded without error but I could not see it in the WordPress gallery. I could confirm that the image was on my server, and that if I viewed the image directly with a URL it would display. The WordPress preview, however, did not show the images.
Lesson learned.