On the first post you linked to, when I try to open the image link for brainwaves2.jpg directly I get an error message saying that the image cannot be displayed because it contains errors. This leads me to think that you may have not saved it in the sRGB color profile.
On the second post you linked to, when I try to view the image anti-tv.jpg directly I get a 404 error, which means you have probably deleted the original image. If you upload the image again to insert it , the image will have a new file path name reflecting the month the image was uploaded. It's not enough to upload the image again, you have to completely reinsert the image so that the file path to the image is updated.