I have a bunch of Solution documents. In most of these I have inserted, from file, a .gif image.  The images display perfectly when I create the Solution document. They are perfect when I open the solution document after I have approved it. They display perfectly if I log in as someone else and open the document.

 

Then, after a day or so, when I go back in and open the document again, the image has been replaced with the standard internet red x can't display image icon.

 

Any help appreciated!  We're supposed to be going live with this to customers at the end of the week.