Absolute(long) image URLs <img src="http://testserver/path/to/media.jpg"> are bad when moving a site.
Can a future version use Relative URLs pretty please??? :)
<img src="/path/to/media.jpg">
When you migrate a site from an old URL to a new URL, you have to do a mass find and replace to change all the image src's! :(
I just had to do one with over 6,500 img src's.
P.S. I'd be glad to help test this! :)