The Editor has always had a pair of dialogs that let you insert or edit links or images. They worked okay, but the dojo community believes things can always be improved, so the LinkDialog was revamped for the Dojo toolkit, version 1.4!

Hyperlinks
Hyperlink editing now allows you to specify the target window that the linked document is opened in. this means users of the rich text editor can specify to open up the document in the current window when a user clicks on, to spawning a new window when the user clicks on it. Setting the behavior is as simple as selecting the desired target from a drop down. In addition, a double-click will open up the link editing dialog for you. This makes it quick and convenient to edit links!
Images
The image dialog templates were redone to be cleaner and handle alt text better. In addition, a single click on an image will select it, and a double-click will open up the image editing dialog for you. This is far simpler than the old way of having to drag-select the image, and only the image, then manually opening the image dialog through the drop-down button.
Improvements to validation
The validators that look at the target urls for images and documents have been enhanced. If it has not been provided and the validator detects the location looks like 'hostname/something', then the editor will automatically prepend "http://" to your url for you. What if you still want to use relative urls? Well, you still can! Just be sure to start them with ./, and the validator will not prepend to your url.