LinkButtons within RadAjaxPanel need double-clicking - why?

[GM]

I am using asp:UpdateProgress control to show progress during a button click. I am using telerik controls to ajaxify the submit button. The code sample is below:

<telerik:RadAjaxPanel ID="RadAjaxPanel4" runat="server"> 
  <div class="customButton"> 
    <asp:LinkButton ID="lbtnSave" 
               OnClientClick="return Page_ClientValidate();" 
               runat="server" OnClick="lbtnSave_Click" 
               CausesValidation="true"> 
       <img src="../admin/images/icons/16x16/save.png" /> 
          Save 
    </asp:LinkButton> 
  <div class="customButton"> 
</telerik:RadAjaxPanel> 

My issue:

When I surround the button with the telerik:RadAjaxPanel, I have to click on the button twice. If I remove the panel, the button submits in one click. Is this happening because of the OnClientClick or one of the other LinkButton attributes or because of the surrounding telerik:RadAjaxPanel? Please help.

EDIT 04 27 12 :: 03:08PM
I tried changing the LinkButton to Button - but still the same problem.
Removing the OnClientClick attribute did not help either.

[GM]

I had a check for page refresh on button click event. Apparently, the first button click was somehow causing the page to refresh. Changed the logic to check page refresh - which solved the problem. RadAjaxPanel is innocent!

[Np]

Hello,

I dont have anything for page refresh and am getting the same issue.

I have a radgrid, with a gridtemplate column and a <asp:LinkButton inside of the gridtemplate.

When I click on the link, I want one user control to show up in a tab menu and another to hide. 

For some reason, even though the command associated with the linkbutton is executed, the second user control is not shown unless I click it twice.

Any ideas?