Installed 3.5rc2 to mkyserv.com/gpEasy, then moved it to mkyserv.com. No actual moving of files, just changed the destination of the address. I expected my uploaded images to need to be re-set as per the previous discussion on the matter in the non-beta forums, but found that all images (including the ones required for administration) were broken. Menus would not pop up, etc.
Resolved by zipping my data folder, reinstalled, put my data folder back. Then the only thing left was fixing my uploaded images as expected.