ZM 1.25 on Debian Wheezy. When editing the motion zones the green grid doesn't appear at all, and the red detection zones do not fill with the red grid until after changes are applied (I can add/move the zone corner pointers around, but there is no red texture fill). Once the detection zone changes are applied, the red zone texture appears normally.
I found some posts suggesting that the mootools path may not be correct in functions.php, but I changed it twice and only succeeded in preventing the web interface from loading properly.
I have not noticed any related errors in the zm log.
Any suggestions appreciated.