RadDocumentPane error when dragging

[Edward]

I have:
XAML:

<telerik:RadDocking Grid.Row="1" BorderThickness="0" Padding="0" Margin="5" x:Name="pnlDock">
                <telerik:RadDocking.DocumentHost>

                    <telerik:RadSplitContainer>
                        <telerik:RadPaneGroup x:Name="pnlHelpGuides">
                        </telerik:RadPaneGroup>
                    </telerik:RadSplitContainer>

                </telerik:RadDocking.DocumentHost>

C#:

UCEditor currentEditor = new UCEditor();
RadDocumentPane newPane = new RadDocumentPane() { Header = tabHeading, Title = tabHeading, Content = currentEditor, CanUserClose = true };
pnlHelpGuides.AddItem(newPane, Telerik.Windows.Controls.Docking.DockPosition.Center);                       
currentEditor.ImportDocument(e.Result as byte[]);
currentEditor.ShowEditor();

I load several documents based on user selection this way.
For some reason when user selects the first document and starts dragging get the following unhandled exception:

Cannot find a Resource with the Name/Key Theme [Line: 1693 Position: 52]

This only happens with the first document.  Not subsequent ones.  Everything works fine if I just ignore the error.
Right now I am just intercepting and handling for the error in App.xaml.cs.

[Konstantina]

Hi Edward,

We are not aware of such issue. Could you please share with us with which version of the controls you are experiencing the issue. If you could isolate the problem in a sample project and send it to us it will be really helpful for tracking down the source of the problem in a timely manner.

Looking forward to your reply.

Regards,
Konstantina
the Telerik team

[Edward]

Just quickly, Q2 2011 SP1.

[Konstantina]

Hello Edward,

Could you please try with the latest available version of the control - either the internal build from Monday, or the Q3 2011 SP1 official release. If you confirm the problem, could you please try to isolate it in a small project and send it back to us.

Thank you in advance.

Kind regards,
Konstantina
the Telerik team

[Edward]

We don't have license to latest build.  Would I have to use the trial version?

[Konstantina]

Hi Edward,

Since you don't have license, you have to use a trial version.

All the best,
Konstantina
the Telerik team