I can't replicate this bug in my testing. ModelAdmin DOMs are working fine for me in 2.4.
Just checked in the upgrades for all the image gallery UI packages. Thickbox has been sunsetted. :(
Thx for the gallery UI updates UncleCheese .... all is looking almost great now :)
The close button, next/back buttons and caption background images aren't loading for Fancy Box, but only in IE - loads fine for Crome and Firefox. Could be a bug I've had before with an older version where the images for the box doesn't load in IE when a site isn't live but I won't be able to test this for a couple of days.