I have an igGrid as follows:

<%= Html.Infragistics().Grid(Model.Subjects)
				.ID("teamSubjectGrid")
				.RenderCheckboxes(true)
				.PrimaryKey("SubjectId")
				.UpdateUrl(Url.Action("SaveTeamData"))
				.Columns(column =>
		{
			column.For(x => x.SubjectId).HeaderText("").Width("20px").Hidden(true);
			column.For(x => x.SubjectName).HeaderText("Name").Width("250px");
			column.For(x => x.SubjectTag).HeaderText("Id").Width("200px");
			column.For(x => x.fTeamMember).HeaderText("Member").Width("100px").DataType("bool"); ;
		}).Features(features =>
		{
			features.Paging().Type(OpType.Local).PageSize(10);
			features.Selection().Mode(SelectionMode.Row).MultipleSelection(false);
			features.Filtering().Type(OpType.Local);
			features.Updating().EnableAddRow(false).EditMode(GridEditMode.Row).EnableDeleteRow(false).ColumnSettings(columnSettings =>
				{
					columnSettings.ColumnSetting().ColumnKey("SubjectId").ReadOnly(true);
					columnSettings.ColumnSetting().ColumnKey("SubjectName").ReadOnly(true);
					columnSettings.ColumnSetting().ColumnKey("SubjectTag").ReadOnly(true);
					columnSettings.ColumnSetting().ColumnKey("fTeamMember");
				});
		})
			.Height("500px")
			.DataSource(Model.Subjects)
			.DataBind().Render()%>

The javascript that gets run when a user presses a Save button below the grid is as follows:

function saveChanges() {
			//
			//  First check we have a team name
			//
			teamName = $("#teamNameEntry").val();
			if (!teamName) {
				alert("Please provide a team name");
				return;
			}

			var webMethod = new String('/KDT/UpdateTeamName');
			var parameters = "{'teamId':'" + currentTeamIdString + "', 'teamName':'" + escape(teamName) + "'}";

                      	$.ajax(
			{
				type: 'Post',
				url: webMethod,
				data: parameters,
				contentType: "application/json; charset=utf-8",
				dataType: "json",

 
				success: function (msg) {
				    alert("about to call save Changes");
				    $("#teamSubjectGrid").igGrid("saveChanges");
				    alert("called save Changes");
					$("#editTeamDialog").igDialog('close');
					window.location = '/KDT/Teams/' + currentTeamIdString;
				},
				error: function (e) {
					alert("Sorry there was a problem saving your changes.  Please try again.");
				}
			});

			return true;
		}

On all browsers the two debug alerts are shown, and in IE 7/8/9/10, Chrome and Firefox the Update Url SaveTeamData is called with no problem.  

However using Safari on both a Mac and Windows while the alerts are shown, the Update Url is never called.

I'm using igGrid on another page with the exact same behaviour, IE/Chrome/Firefox are fine, Safari does not call the update url.

I'm using the latest 13.1, fully patched, with jQuery 1.7.2.   Safari v5.1.7 on Windows 8 64bit.   We've tried Safari on a couple of different Macs and it has the same problem.

Does anyone have any ideas why Safari would not work?

Thanks

Richard