I have a catalog of pictures that I use as backgrounds for different people in messaging. Some will not load, or appear to load but after leaving the customization screen do not appear. I have looked at their attributes (properties) on both the phone and the computer where I keep the backup (more information) and there doesn't seem to be any differences except size and that doesn't seem to be a factor as some which load are large and some that don't are small. Some are from my pictures and some are downloaded images. All are jpegs.