When I try to set multiple group-by columns by dragging a column into a position that isn't at the end, I get a strange behavior where the column heading I'm dragging gets stuck when I release the mouse.
See this
JSFiddle, an example provided by from
another thread in this forum.
Browser Detail: Google Chrome 18, Win7 64-bit.
This happens on every groupable:true grid I've used with a groupFooterTemplate, but I don't have the problem when using IE9, or FF10.0.2 on the same machine.