Locked Shapes Don’t Work the Same as they did prior to V6. In fact, I’d say locking is broken.
Try this: create 2 shapes by drawing a rectangle and then duplicate it. Lock one of the rectangles. Now select them both and try to use the Align Horizontal or Vertical buttons or the Offset buttons (with say a 0 offset)…
Nothing happens! OmniGraffle used to move the unlocked rectangle while leaving the locked shape where it is.
I think this is bug. Isn’t it?