I'm sure this has been discussed, but I don't find the thread. Here is my issue:
When closing an open path by clicking the end point, AI does not recognize "Option" or "Spacebar" modifier keys as it should. The option key should allow me to control the direction point independant from the corresponding anchor point, while the spacebar should allow me to move the active anchor point, while the mouse is still down. This is exactly how Photoshop CS6 works (this was an upgrade for Photoshop).
Here is a short video illustrating the "bug" in Illustrator:
http://www.youtube.com/watch?feature=player_detailpage&v=g5ViHSLJ_SM
Please let me know if you share my concern about this pen tool bug.