i've not found a possibility to change the size of a image in the TinyMCE editor an keep the aspect ratio with 2.3-RC3. this was possible in the "old/current 2.2.3" version by selecting the image, change the width value in the sidebar and press tab. is there a way to do it with RC3?
thx this works but it's hard to set a image to a specific width unless your mouse works very precise. it would be nice if one could set one value and it would calculate the other one. also in rc3 the side-bar does not grab the the current width and hight nor alt-text of a selected/highlighted image.
Ive noticed some odd issues with that sidebar as well. You might like to make a ticket listing your issues on open.silverstripe.com. There is already 1 ticket outstanding for 2.3 relating to inserting images - http://open.silverstripe.com/ticket/3460 but this is slightly different.