This just started happening to me today - I was using Illustrator/Photoshop CS3 last night, everything was just fine. I woke up this morning, no control over the aspect ratio of anything when holding the shift key. I reset my Illustrator preferences, restarted my computer, nothing worked. I closed Entourage, deleted Boxee, still nothing.
This is nuts - HELP! I can't survive without this feature - is so key. What the heck could have possibly caused this???
Tried to think of any updates that I did recently and the only one was for my browser. Quit Firefox and voila, got my shift key back!
Gizmo, are you using Firefox as your browser?
Shift constrain and duplicate completely non functional. Deleted preferences, deleted settings, no other apps running other than illustrator CS4 nothing works.
Running Illustrator CS4, Mac OS X 10.5.8. Please help, any suggestions welcome?