Chrome 16 - jumps when slide up and slide down
Firefox 9 - jumps when slide up
IE 9 - jumps when slide up
I mean when categories are all "open". When i click on first bar ... slide up animation starts. When it's finished there is no space between bars... but when collapsed bar changed color/opacity/blinds a small gap occuring between bars so it looks like this bar jumps.
When animation is finished the class "catToggled" has been attached to the container... and this class has margin-bottom 0.7em !important so after animation bar under toggled bar moves 0.7em down - so it looks like "jump"