NX3
The ALT key does disable the snapping function for me when adding/moving a note if it is pressed and held before a snap occurs. That is, if I pick/create a note, press and hold the ALT key, then move the note, it moves or inserts with no problem.
On the other hand, when I try to move or insert a note without the ALT key and the note tries to snap to a location, then at that time it is too late to use the ALT key. Once it has picked up on a snap point, I usually have to go ahead place the note with its new association and then re-move it, or cancel the move and try again.
This is only a problem when there are a number of notes in the are I am working. If there are only a couple of notes, then the note in transition can be dragged far enough to lose the snap without picking up a new snap from another note.
Have I made this confusing enough or should I try harder?