Ajax Validator call out extender does not get positioned correctly in Chrome

Question

I have added required field validator control and added ajax validator call out extender to a textbox. On chrome browser the call out pop up does not appear behind the right sode of the textbox instead it appears somewhere outside the table in which the textbox is present. It works fine in IE 8, IE 7 and Firefox browsers but in Chrome alone this problem occurs! The code is pasted below:

 <asp:TextBox ID="txtSecurityCode" Width="70px" MaxLength="5" CssClass="para1DarkBlue"
                                                                                ValidationGroup="Subscribe" runat="server"></asp:TextBox>
                                                                            <cc1:FilteredTextBoxExtender ID="txtSecurityCode_FilteredTextBoxExtender" runat="server"
                                                                                Enabled="True" TargetControlID="txtSecurityCode" FilterType="Numbers" FilterMode="ValidChars"
                                                                                ValidChars="0123456789">
                                                                            </cc1:FilteredTextBoxExtender>
                                                                            <asp:RequiredFieldValidator ID="Req_txtSec" ControlToValidate="txtSecurityCode" ValidationGroup="Subscribe"
                                                                                Display="None" ErrorMessage="Please enter Security Code." CssClass="error" runat="server"
                                                                                SetFocusOnError="true"></asp:RequiredFieldValidator>
                                                                            <cc1:ValidatorCalloutExtender ID="ValidatorCalloutExtender2" runat="server" Enabled="True"
                                                                                TargetControlID="Req_txtSec" CssClass="CustomValidator">
                                                                            </cc1:ValidatorCalloutExtender>