jQuery Grid Plugin - jqGrid

So i'm using the JQGrid and it works great for the most part.  But I'm seeing random crashes in the Binding for the datasource.

Specificially i'm using a WCF Service to fetch my IQueryable<T> and then I'm simply attempting to bind it.

The error I'm getting is "object null" and its being thrown from with in the triand assembly. 

   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation)   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClassd.<InvokeActionMethodWithFilters>b__a()   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)   at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)   at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters)   at lambda_method(Closure , ControllerBase , Object[] )   at ABC.WONK.Admin.Controllers.OrganizationsController.SearchGridDataRequested() in C:\Source\kss\regportal\portal.admin\Controllers\NiftyController.cs:line 172   at Trirand.Web.Mvc.JQGrid.DataBind(Object dataSource)   at Trirand.Web.Mvc.JQGrid.DataBind()   at Trirand.Web.Mvc.JQGrid.GetJsonResponse()   at Trirand.Web.Mvc.JQGrid.FilterDataSource(Object dataSource, NameValueCollection queryString, IQueryable& iqueryable)   at Trirand.Web.Mvc.Util.ConvertToJson(JsonResponse response, JQGrid grid, DataTable dt)at Trirand.Web.Mvc.Util.PrepareJsonResponse(JsonResponse response, JQGrid grid, DataTable dt)

Possible null value passed in the IQueryable<T> result set?  I looked and when I was looking at the data it was no null values.

Could this be a timing thing?  I was thinking perhaps my WCF results were comming back to late...but that would have to be a very rapid timeout on the controls part.  It happended with in 2 seconds of page creation.