Blinking with mouseover and mouseout

I'm making a reversible cards with options in the back, but blink occurs when the mouse touches the border of the objects in the rear face (and trigger mouseout incorrectly).

Example: https://app.box.com/s/m9ue5fcus97kki1h8r20

Only works fine in Firefox and Aurora, not in Chrome, Canary, Safari, IE, and Opera.

Edit: it's possible to convert edge code to Create a new fiddle - JSFiddle for to share and test edge code?