• less than 10 results = shows results as expected
• 11 results – shows console error once on first click of down scroll, but the 11th record is never shown.
• 12 results – shows console error on first two clicks of down scroll, but never shows the 11th or 12th records.
• 13 results - shows two console errors for each of first two clicks of down scroll, but never shows the 11th / 12th  / 13th records.
• 14 results – shows console errors on first two clicks of down scroll and does not move the scrollbar.  However, on the third and subsequent clicks, the grid starts showing the fetched records.
• 15 results - shows console errors on first two clicks of down scroll and does not move the scrollbar.  On the third and subsequent clicks, the grid starts showing the fetched records.
• 17 results - shows console error on first click only of down scroll and does not move the scrollbar.  On the second and subsequent clicks, the grid starts showing the fetched records.
• 18 and over results – works correctly with no errors

Anyone else seeing this behavior?  This is really becoming a show stopper for us. 

<script type="text/javascript">

$().ready(function() {

	function startChange() {
		var startDate = start.value();

		if (startDate) {
			startDate = new Date(startDate);
			startDate.setDate(startDate.getDate() + 1);
			end.min(startDate);
		}
	}

	function endChange() {
		var endDate = end.value();

		if (endDate) {
			endDate = new Date(endDate);
			endDate.setDate(endDate.getDate() - 1);
			start.max(endDate);
		}
	}

	var start = $("#valid_from").width(200).kendoDatePicker({
		change: startChange,
		format: "dd-MM-yyyy"
	}).data("kendoDatePicker");

	var end = $("#valid_to").width(200).kendoDatePicker({
		change: endChange,
		format: "dd-MM-yyyy"
	}).data("kendoDatePicker");

	start.max(end.value());
	end.min(start.value());		
});

</script>

<form action="xxx" method="post">
<input type="hidden" name="request_id" value="9" />
<input type="hidden" name="product_id" value="19" />
<table>
<tr>
	<td><strong>Valid From</strong></td>
	<td> : 
		<input type="text" name="valid_from" value="21-02-2012" id="valid_from" readonly="readonly" maxlength="20" size="20"  />
	</td>
	<td><strong>Valid To</strong></td>
	<td> : 
		<input type="text" name="valid_to" value="21-02-2012" id="valid_to" readonly="readonly" maxlength="20" size="20"  />
	</td>

</tr>
<tr>
	<td colspan="3">
		<input type="submit" name="btnSave" value="Save"  />
		<input type="button" id="btnBack" value="Back" onclick="window.history.back()" />

	</td>
</tr>
</table>
</form>

array(6) {
  ["request_id"]=>
  string(1) "9"
  ["product_id"]=>
  string(2) "19"
  ["btnSave"]=>
  string(4) "Save"
}