I don't feel any difference either. By the way, what bothers me on RS4 is heat. RS4 seems to be hotter and I'm now preparing the 10.0.16299.371 ISO.. I will will revert back to RS3 for a while.
Did you use the mouse in all situations? Click on name two times to rename it > change extension > click on desktop > click on yes ?
Can you try again? Test it on Desktop and do not press 'Enter'. After change the extension, click anywhere else.
you are right the bug is there !! a rectangle is being formed with the mouse pointer at the end of this drill.
I don't think this is a issue just for some users. Some people might not be doing this correctly to trigger the bug
It's hard to notice for people who like using only keyboard like me. I rarely use mouse except for gaming.
I did exactly what the animation did. Select the filename from the icon using the mouse, selected the existing extension (rar) and typed (zip) and clicked outside the filename and windows asks for confirmation and i mouse clicked "YES" and clicked outside the filename again, even moved the mouse when clicking, nothing happened, Btw, i am also on 17133.73.