jQuery Grid Plugin - jqGrid

I'm just getting started with jsGrid and ran into a problem.  The grid loads the first row and then throws an “Invalid Array Length” error in the javascript console on line 836.

Anybody see what I'm doing wrong?  Thanks!

Here's my config:

{
    url:'pipes',
    datatype: 'json',
    mtype: 'GET',
    colNames:['Time Stamp','Duration', 'Length','Units','Notes'],
    colModel :[
      {name:'time_stamp', index:'time_stamp', width:150},
      {name:'duration', index:'duration', width:50, align:'right'},
      {name:'length', index:'length', width:50, align:'right'},
      {name:'units', index:'units', width:50, align:'right'},     
      {name:'note', index:'note', width:150, sortable:false} ],
    pager: jQuery('#pager'),
    rowNum:10,
    rowList:[10,50,100],
    sortname: 'time_stamp',
    sortorder: “desc”,
    viewrecords: true,
    imgpath: 'scripts/jquery/themes/basic/images',
    caption: 'Pipe Tally'
  }

Here's my json data:

{"records": 3, "total": 1, "rows": [{"cell": ["2009-02-25 12:30:05", "0", "30", "ft", "test"], "id": "1"}, {"cell": ["2009-02-25 13:30:25", "0", "29.7", "ft", ""], "id": "2"}, {"cell": ["2009-02-25 13:30:25", "0", "29.7", "ft", "Notes"], "id": "3"}], "page": 1}