I should have realized that linking images from Facebook wouldn't be a safe thing to do. A lot of my posts now have missing images due to Facebook apparently deciding to change the URLs for those images. I'm not sure why some changed and some didn't, but I won't be cross-linking to Facebook anymore.
I did check and ensure that the tutorials are all fine. I'll be fixing other posts as I find the time.
So sorry for the inconvenience!
