If you start RKWard, create an empty workspace, and then close it (or open an existing one), you're asked about saving changes, even if you've done absolutely nothing. The same happens if you open an existing workspace and close it immediately.
I know detecting changes is probably hard, but maybe RKWard could simply remember whether any code was run, and avoid asking to save changes if that's not the case. That's a little detail, but it would make the app look much more clever and professional. ;-)
(This is with RKWard 0.5.6z+0.5.7+devel1.)