I have the exact same problem!
All the size options are not selectable except full size. I’m running WordPress 2.8.6. Image settings in Settings>>Media are set to the sizes I want them to be and I even changed them slightly just to see if it would kick in after editing. Still no sizing options upon upload or after the fact (accept the %-scale on the side) but I don’t want to rely on that, it should work the way it was intended to.
Please help!
Thanks
