this is not the first time I see some java to json serializer having this beahviour with List of object:

if there is more than one entry i've a javascript array associated with a variable, but if the list has only one element then the variable holds directly the object (could be a json, could be a string, ....).

this is the output of a 2 elements list

{"page":"1","records":"2","rows":[{"cod_cliente":"-",...},{"cod_cliente":"-",...}],"total":"1"}

and this if 1

{"page":"1","records":"1","rows":{"cod_cliente":"-",...},"total":"1"}

rows.... to be or not to be an array...

also if is not a jqGrid's problem it doesnt'work!

i simply suggest this little patch to be more solid

in the addJSONData function just after the line

if (!drows) { drows = []; }

add

if (ts.p.records == 1) {

if (! drows.length) {

var no_array_row = drows;

drows = new Array(1);

drows[0] = no_array_row;

}

}