jQuery Grid Plugin - jqGrid

I suspect it is a bug in subgrid. Three cases described the exactly same behavior after enabled "expandOnLoad: true" in subGridOptions. Basically only half of the subgrids expended, and the rest of the rows can't be expanded even by clicking the triangle manually. More descriptions can be found at the link,

http://www.trirand.com/blog/?p.....rt/#p26280

I checked with firebug, it looked like the html/javascript got messed up starting from the second half of the grid rows.

I use jqgrid version 4.1.2 with xml data, and another user said he use 4.3.1 with json.