Everything works as it should. I just find it annyoing that if you manage to click the checkbox "during" the update of the updatepanel it does not grab the click. Is there som workaround/fix for this or do I simply have to rethink my design and put the checkboxes in a different panel?
If you use AutoPostBack="True", checkbox will be working fine. Thanks
<asp:UpdatePanel ID="updatepanel" runat="server">
<ContentTemplate>
<asp:Checkbox ID="chk" runat="server" AutoPostBack="true"></asp:CheckBox>
</ContentTemplate>
</asp:UpdatePanel>