JStree is not working properly with IE9. You can check this in their demo page here. Trying internally, nodes can not be collapsed/expanded and the whole tree is expanded after load. Some hint on this ?
Found a solution, change the IE mode in the header (switch off quirk mode) :
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
It's working for IE8 and IE9.
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