When you make a post, the picture is not stored with the post. Only the link to the picture is stored with the post. So unless you were to go back and change the link in the old post to the location of the new picture, it's still pointing at the non-working link.
This is something people should keep in mind as they're building all these posts with pics. While it looks great right now, if the poster with the pics changes ISPs, or moves their site, the now archived post will no longer show the picture. If the post doesn't explain well, and relies on the picture to do the explaining, there's a big potentional for it be a completely non-sensical (is that a word?) post at some time in the future.
If you always do what you've always done,
You'll always get what you've always got
This is something people should keep in mind as they're building all these posts with pics. While it looks great right now, if the poster with the pics changes ISPs, or moves their site, the now archived post will no longer show the picture. If the post doesn't explain well, and relies on the picture to do the explaining, there's a big potentional for it be a completely non-sensical (is that a word?) post at some time in the future.
If you always do what you've always done,
You'll always get what you've always got