Smart-guides are slightly buggy in CS4 and it makes it a little
irritating to work with them. I wonder if this is the same in later
For example, try this:
Create a new document.
Switch off all snapping (to document grid, guides, baseline etc.). Just
enable smart guides. And in smart guides, only enable "Align to object
edges" and "Smart dimensions."
Now, in the new document, draw a rectangle. Now duplicate it by
alt-shift-dragging (to constrain direction). Drag it off a few cm to the
So we now have two identical rectangles -- both with their top edge
lying on the same point of the y-axis. Their heights are identical too.
Now, with the black pointer, move the bottom edge of one of the
rectangles up and down. What happens?
Sometimes the "identical height" smart guide appears. Sometimes the
"Align to object edges appears" and sometimes both smart guides appear!
Why?! Clearly whenver the rectangles are identical height, their bottom
edges are aligned as well.
So we should NEVER get a situation where only one or the other of the
smart guides appears! The smart guides should always either both be on,
or both be off -- but never one yes and the other no.
Is this happening is CS6 as well?
Obviously the situation is much worse when more smart guides are
allowed, and more snapping to various things is allowed. So when I zoom
in to look at what has happened, things aren't always aligning perfectly
despite the guides.