the live-resizing function is in the browser AFAIK there is none in safari but when you insert the image you can set width press tab and get the proportional height (shift + tab for the oposite direction). you're able resizing with the right mouse button if you have one :-)
Ahh, interesting thanks. Just tested the TinyMCE demo in FF and Safari and you are correct!
The feature I was missing most was being able to select an image and make it a link to a "Page on the site" using SS's sidebar. Is there anyway to do this in Safari? Or do you always have to enter the full URL?