I've found a solution for this problem :
under IE, you need to create your accordion with this option :
- animated : false // solve some animation problem, during the slide, the content zone is smaller than it's final size after the animation
- autoHeight : false // in this case, the scrollbar on the right not appear and the content zone have always the good size
so on constructor call, you need to precise this :
- $("#accordion").accordion({ autoHeight: false,
- animated : false
- });