This is hard to explain but easy to replicate.
In my app I have a grid that you can select rows by clicking and dragging a selection area. However a lot of the time you cannot click and drag because the Tab Header seems to capture that even and you end up dragging the header around.
It happens with any control in a tab item that has a background even a simple grid.
Thanks,
Richard
<
Grid
>
<
telerik:RadTabbedWindow
>
<
telerik:RadTabbedWindow.Items
>
<
telerik:RadTabItem
Header
=
"Tab 1"
>
<
telerik:RadGridView
/>
</
telerik:RadTabItem
>
<
telerik:RadTabItem
Header
=
"Tab 2"
>
<
Grid
Background
=
"AliceBlue"
></
Grid
>
</
telerik:RadTabItem
>
</
telerik:RadTabbedWindow.Items
>
</
telerik:RadTabbedWindow
>
</
Grid
>