* Fixed the problem where aborting a print did not always home the head.
* Fixed bug in acceleration planning causing slow moves on rare occasions.
* Disable the normal menus during USB printing, and support for USB based menus.
+* Disable stepper drivers after print is finished or aborted, so you can manually move the head.
* Expert feature: Support M907 for setting the motor current.
Ultimaker Original - Firmware update - 13.12