Overprint attribute does not work adequately
Create or select any object. On the Attributes panel set Overprint Fill/Stroke checkmark.
After deselecting object Overprint attribute remains CHECKED instead of resetting. And every newly created object instantly receive this Overprint attribute!
Very annoying and sometimes cause real troubles with undesired overprinted objects.
Overprint attribute should reset to UNCHECKED after deselecting an object.