RadTabControl - dropdown menu problem

[raquos]

Hi, 
I've found strange problem with dropdown menu in RadTabControl. Take a look at simple code:
 <UserControl x:Class="TabControlProblem.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
    mc:Ignorable="d"
    >
    <Grid x:Name="LayoutRoot" Background="White">
        <telerik:RadTabControl DropDownDisplayMode="WhenNeeded">
            <telerik:RadTabItem Header="Lorem">
                <telerik:RadTabControl TabStripPlacement="Bottom" DropDownDisplayMode="WhenNeeded">
                    <telerik:RadTabItem Header="Lorem 1"/>
                    <telerik:RadTabItem Header="Lorem ipsum 1"/>
                    <telerik:RadTabItem Header="Lorem 2"/>
                    <telerik:RadTabItem Header="Lorem ipsum 2"/>
                    <telerik:RadTabItem Header="Lorem 3"/>
                    <telerik:RadTabItem Header="Lorem ipsum 3"/>
                    <telerik:RadTabItem Header="Lorem 4"/>
                    <telerik:RadTabItem Header="Lorem ipsum 4"/>
                    <telerik:RadTabItem Header="Lorem 5"/>
                    <telerik:RadTabItem Header="Lorem ipsum 5"/>
                    <telerik:RadTabItem Header="Lorem 6"/>
                    <telerik:RadTabItem Header="Lorem ipsum 6"/>
                    <telerik:RadTabItem Header="Lorem 7"/>
                    <telerik:RadTabItem Header="Lorem ipsum 7"/>
                    <telerik:RadTabItem Header="Lorem 8"/>
                    <telerik:RadTabItem Header="Lorem ipsum 8"/>
                    <telerik:RadTabItem Header="Lorem 9"/>
                    <telerik:RadTabItem Header="Lorem ipsum 9"/>
                </telerik:RadTabControl>
            </telerik:RadTabItem>
            <telerik:RadTabItem Header="Lorem ipsum"/>
            <telerik:RadTabItem Header="Lorem"/>
        </telerik:RadTabControl>
    </Grid>
</UserControl>

...and effect is like in attachment. Dropdown menu goes to the top of the screen. I would be grateful for any solution.

[Tina Stancheva]

Hello Rakak,

Thank you for reporting this issue. Our investigation showed that it is caused by the TabStripPlacement settings - it seems that if you change the default value of this property, the DropDownMenu of the RadTabControl is displayed at the left top corner. we logged the issue in our PITS so that you can track its progress.

I also updated your Telerik account for bringing it to our attention.

Greetings,
Tina Stancheva
the Telerik team