<telerik:RadGrid
AutoGenerateColumns="false"
AllowFilteringByColumn="True"
AllowSorting="True"
Width="700px"
ID="RadGrid1"
runat="server"
Skin="Telerik"
OnNeedDataSource="RadGrid1_NeedDataSource"
OnInsertCommand="RadGrid1_InsertCommand"
OnDetailTableDataBind="RadGrid1_DetailTableDataBind"
OnItemCommand="RadGrid1_ItemCommand"
OnDeleteCommand="RadGrid1_DeleteCommand"
OnUpdateCommand="RadGrid1_UpdateCommand"
GridLines="None" AllowPaging="True" PageSize="8" EnableEmbeddedSkins="False"
>

I am trying to modify the Telerik skin.  I have finally got the CSS working by MANUALLY adding a reference to the CSS file in my Master Page.  Now I have discovered that the background image is not working for the Filter dropdown.
  
Since I can't upload an image to the forum, here's a link to a screen shot of my grid:
http://tomgilkison.blogspot.com/2008/06/filter-background-not-showing-up-in.html

I have looked through the CSS and found:
/*filtering*/
.GridFilterRow_Telerik
{
 background:#f9f9f9;
}

This new way of working with Skins is sooooo painful.  I hope it's worth it in the end.  I have probably spent a good day troubleshooting WebResource.axd issues.  Not fun when the project was due a week ago...

telerik:RadToolTipManager ID="RadToolTipManager1"
Width="360" Height="288" Animation="Slide"
Position="MiddleRight" Sticky="true" AutoCloseDelay="1000"
OnAjaxUpdate="OnAjaxUpdate" runat="server">
</telerik:RadToolTipManager>


Here is the .vb code

Protected Sub OnAjaxUpdate(ByVal sender As Object, ByVal args As ToolTipUpdateEventArgs)
Me.UpdateToolTip(args.Value, args.UpdatePanel)
End Sub

Private Sub UpdateToolTip(ByVal contextKey As String, ByVal panel As UpdatePanel)

If contextKey = "" Then Exit Sub
Try
Dim ctrl As Control = Page.LoadControl("~/App_WebUserControls/bpThumbnail.ascx")
Dim bigThumbnail As App_WebUserControls_bpThumbnail = DirectCast(ctrl, App_WebUserControls_bpThumbnail)
bigThumbnail.AltText = contextKey
Finally
End Try
End Sub