[Solved] What should be returned?

[Jared]

[GridAction(EnableCustomBinding = true)]
public ActionResult DeleteFile(GridState state, int id)
{
    //Removed code for simplicity

    if (reply != null && reply.Success)
    {
        return Json("", "text/plain");
    }
    return Json("");
}

This action gets fired when deleting a row from the grid, everything is ajax databound. The Grid tries to rebind but when debugging, telerik.common.min.js complains: "Unable to get value of the property 'length': object is null or undefined".

I've been trying to figure out where this is coming from, the Grid itself isn't throwing any errors so I'm a bit lost at what I'm doing wrong? 
My only way around this so far is in the grid's "onComplete" event... I check if the name is "delete" if so rebind the Grid manually. I still get the script error, but it "works". Hopefully I'm just missing something simple?

[Jared]

I just did it a different way, because it seems as I am required to return back a list of objects. I wouldn't think I HAVE to return something on a delete, since that doesn't always makes sense.