Because you need to switch browsers.
Many people can see only a percentage of pictures that I publish to a post.
I find that Firefox, as great a browser as it is, will sometimes block certain pictures.
So I simply switch over to Chrome or IE. For more info please see the post titled:
Computer Tip for Faster Operation, More Speed, More Horsepower for Your Computer (revealing the best, fastest web browser for you to use)
that you’ll find in the Technology section of this blog.