If you run the KitchenSink example in IE 10, when you expand the node, notice the arrow does not change state. To be more exact the x-grid-tree-node-expanded class gets added and then removed, its a small flicker.
*EDIT BY SLEMMON
I also see the same behavior in 184.108.40.2064
Last edited by slemmon; 12 Apr 2013 at 1:55 PM.
Reason: additional test case info