The function of rotating and duplicating objects doesn't work. With 'alt' I can move the little blue cross, (marking the center of the object I want to rotate and duplicate) but somehow it doesn't 'stick' to the new rotation center. Even worse: Illustrator get stuck and the only way to get out is with ctrl+alt+delete. Who recognises this very annoying problem?
Btw: of course I'm using the latest version of Illustrator. The problem occurs for a while, also in older versions of Illustrator.