Being a tinkerer by nature, I looked at the embedded pic problem.
Here is what I have learned:
Some photos work and some don't!
Besides that, it does appear to be the source of the pic which is a problem. If I copy the url from the properties of the undisplayed pic to the browser address and display the pic, then use the browser back arrow to display the forum post, the pic appears just fine. I am assuming it is being displayed from the Internet cache on my hard drive. This seems to indicate that the browser has no problem displaying the pic, apparently, it just has a problem requesting it from the source.
Are you aware of any way that a host could figure out, possibly from the return address on the request, that it is an embedded pic and so decide to reject the request?
This is Fred's theory and it is sounding better, except that some people (you?) seem to be seeing pics that I and others can not.