Copied Object - World Limit Editing Bug

Create a Static Sprite.
Set WorldLimit Mode to "Null" and select Callback checkbox.
Edit Worldlimits using WYSIWYG editor.

Copy that object (Static Sprite)

Paste a new one and move it somewhere else on screen.
Click on it and try to edit it's World Limits.
Editor jumps back to original object and will not lt you edit
new objects limits as if it is still referencing original objects World Limits.

Workaround.
Select new object and change World Limit mode back to None.

Select anything else to deselect that object.
Select your object again and reset World Limits to "Null" or other mode again.
Then editor will allow you to edit your limits.

Not a real major one , I know, but just figured I's mention it...
Work on physics first..;-)