I've modelled a grid from your combobox demo here: http://demos.telerik.com/aspnet-ajax/combobox/examples/functionality/comboingrid/defaultvb.aspx?product=combobox and it's exhibiting the same unwanted tabbing behaviour.  That is, tabbing off the combox seems to go to the grid header instead of the next field.  How can I fix this?
 
 
 
                                <telerik:RadGrid ID="grdSalesLeads" GridLines="None" runat="server" AllowAutomaticDeletes="True"        AllowAutomaticInserts="True" PageSize="30" AllowAutomaticUpdates="True" AllowPaging="True"        AllowSorting="true" AllowFilteringByColumn="true"        AutoGenerateColumns="False" DataSourceID="dsSalesLeads" CellSpacing="0"        OnItemCommand="grdSalesLeads_ItemCommand" OnItemDataBound="OnItemDataBoundHandler">        <PagerStyle Mode="NextPrevAndNumeric" /><MasterTableView AutoGenerateColumns="False" CommandItemDisplay="Bottom" DataKeyNames="SalesID"        DataSourceID="dsSalesLeads" EditMode="InPlace"><CommandItemSettings ShowExportToWordButton="true" ShowExportToExcelButton="true"                ShowExportToCsvButton="true" /><RowIndicatorColumn Visible="True" FilterControlAltText="Filter RowIndicator column"><HeaderStyle Width="20px"></HeaderStyle></RowIndicatorColumn><ExpandCollapseColumn Visible="True" FilterControlAltText="Filter ExpandColumn column"><HeaderStyle Width="20px"></HeaderStyle></ExpandCollapseColumn>    <Columns>        <telerik:GridEditCommandColumn ButtonType="ImageButton" UniqueName="EditCommandColumn">           <ItemStyle CssClass="MyImageButton" />        </telerik:GridEditCommandColumn>        <telerik:GridBoundColumn DataField="SalesID" DataType="System.Decimal"            FilterControlAltText="Filter SalesID column" HeaderText="SalesID"            ReadOnly="True" SortExpression="SalesID" UniqueName="SalesID" Visible="false">        </telerik:GridBoundColumn>        <telerik:GridTemplateColumn UniqueName="ProspectName" HeaderText="ProspectName" SortExpression="ProspectName" >            <ItemTemplate>                <%#DataBinder.Eval(Container.DataItem, "ProspectName")%>            </ItemTemplate>            <EditItemTemplate>                <telerik:RadComboBox runat="server" ID="cbProspects" EnableLoadOnDemand="True" DataTextField="ProspectName"                    OnItemsRequested="cbProspects_ItemsRequested" DataValueField="ProspectName" AutoPostBack="true"                    HighlightTemplatedItems="true" Height="140px" Width="220px" DropDownWidth="420px"                    OnSelectedIndexChanged="OnSelectedIndexChangedHandler">                    <HeaderTemplate>                        <ul>                            <li class="col1">Prospect Name</li>                            <li class="col2">Contact Name</li>                        </ul>                    </HeaderTemplate>                    <ItemTemplate>                        <ul>                            <li class="col1">                                <%# DataBinder.Eval(Container, "Text")%>                            </li>                            <li class="col2">                                <%# DataBinder.Eval(Container, "Attributes['TargetContact']")%></li>                        </ul>                    </ItemTemplate>                </telerik:RadComboBox>            </EditItemTemplate>        </telerik:GridTemplateColumn>        <telerik:GridBoundColumn DataField="PhoneNumber"            FilterControlAltText="Filter PhoneNumber column" HeaderText="Phone Number"            SortExpression="PhoneNumber" UniqueName="PhoneNumber">        </telerik:GridBoundColumn>        <telerik:GridBoundColumn DataField="Website"            FilterControlAltText="Filter Website column" HeaderText="Website"            SortExpression="Website" UniqueName="Website">        </telerik:GridBoundColumn>        <telerik:GridBoundColumn DataField="TargetContact"            FilterControlAltText="Filter TargetContact column" HeaderText="Target Contact"            SortExpression="TargetContact" UniqueName="TargetContact">        </telerik:GridBoundColumn>        <telerik:GridBoundColumn DataField="Title"            FilterControlAltText="Filter Title column" HeaderText="Title"            SortExpression="Title" UniqueName="Title">        </telerik:GridBoundColumn>        <telerik:GridBoundColumn DataField="Industry"            FilterControlAltText="Filter Industry column" HeaderText="Industry"            SortExpression="Industry" UniqueName="Industry">        </telerik:GridBoundColumn>        <telerik:GridBoundColumn DataField="SourcedBy"            FilterControlAltText="Filter SourcedBy column" HeaderText="Sourced By"            SortExpression="SourcedBy" UniqueName="SourcedBy" Visible="false">        </telerik:GridBoundColumn>        <telerik:GridBoundColumn DataField="Address"            FilterControlAltText="Filter Address column" HeaderText="Address"            SortExpression="Address" UniqueName="Address">        </telerik:GridBoundColumn>        <telerik:GridBoundColumn DataField="City"            FilterControlAltText="Filter City column" HeaderText="City"            SortExpression="City" UniqueName="City">        </telerik:GridBoundColumn>        <telerik:GridBoundColumn DataField="PostalCode"            FilterControlAltText="Filter PostalCode column" HeaderText="Postal Code"            SortExpression="PostalCode" UniqueName="PostalCode">        </telerik:GridBoundColumn>        <telerik:GridBoundColumn DataField="ListID"            FilterControlAltText="Filter ListID column" HeaderText="List ID"            SortExpression="ListID" UniqueName="ListID" Visible="false">        </telerik:GridBoundColumn>        <telerik:GridBoundColumn DataField="DateAdded" DataType="System.DateTime"            FilterControlAltText="Filter DateAdded column" HeaderText="Date Added"            SortExpression="DateAdded" UniqueName="DateAdded" Visible="false">        </telerik:GridBoundColumn>        <telerik:GridButtonColumn ConfirmText="Delete this lead?" ConfirmDialogType="RadWindow"           ConfirmTitle="Delete" ButtonType="ImageButton" CommandName="Delete" Text="Delete"                    UniqueName="DeleteColumn">           <ItemStyle HorizontalAlign="Center" CssClass="MyImageButton" />         </telerik:GridButtonColumn>    </Columns><EditFormSettings><EditColumn FilterControlAltText="Filter EditCommandColumn column"></EditColumn></EditFormSettings></MasterTableView><FilterMenu EnableImageSprites="False"></FilterMenu></telerik:RadGrid>