I have run to that problem also. Sometimes, the web server that you are trying to access is too slow, so the system will show red Xs where the image should be. Two ways to temporarily remedy
1) if you only have a few red Xs, you can right click on your mouse, and select show picture from the menu. This one will give the quickest load of the images.
2) if you have a whole bunch of red Xs, then hit the refresh button at the top of your explorer bar, BUT the system will try to reload the whole page again, and it may take time if your web server is slow because it is slow, or the server is getting a lot of traffic.
For a really busy site, where you don't want to see the images, you could shut off displaying images, especially if there big files of 100K or more. Click on TOOLS at the top of the page; select INTERNET OPTIONS; select the ADVANCE tab, from there you get a list of options, where you check or uncheck to select, down 2/3's down is a heading called MULTIMEDIA, there is a box for SHOW PICTURES, to show pix be sure there is a check in that box. If you want your page to fill faster uncheck it, of course you won't see any images.