Tony, I upgraded from 3.4 to 3.6.1, In 3.6.1 when I select / check a check box on the row from the grid (multiselect:true) I get an error “invalid argument” only in IE but works fine with FF. This error is from jquery.jqGrid.min.js.

The problem is rowid is getting null and throws an error invalid argument when you call namedItem function with rowid being null

getInd: function (rowid, rc) {

var ret = false,

rw;

this.each(function () {

rw =

this.rows.namedItem(rowid);

if (rw)