ArgumentException with reordering items

[Peter]

After i changed the size of the items (ColumnWidth and RowHeight), i get 
sometimes an ArgumentException when I reorder items per drag-drop.
For the DataTemplate, i use a RadFluidContentControl 
System.ArgumentException: '-42,-42,-42,-42' is not a valid value for property 'Padding'.
   at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
   at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
   at Telerik.Windows.Controls.RadTileView.OnDragInitialized(Object sender, DragInitializeEventArgs args) in c:\TB\101\WPF_Scrum\Release_WPF\Sources\Development\Controls\Navigation\TileView\RadTileView.cs:line 948
   at Telerik.Windows.DragDrop.DragInitializeEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) in c:\TB\101\WPF_Scrum\Release_WPF\Sources\Development\Core\Controls\DragDropManager\DragInitializeEventArgs.cs:line 94
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
   at Telerik.Windows.DragDrop.DragInitializer.StartDrag() in c:\TB\101\WPF_Scrum\Release_WPF\Sources\Development\Core\Controls\DragDropManager\DragInitializer.cs:line 169
   at Telerik.Windows.DragDrop.DragInitializer.DragSourcePreviewMouseMove(Object sender, MouseEventArgs e) in c:\TB\101\WPF_Scrum\Release_WPF\Sources\Development\Core\Controls\DragDropManager\DragInitializer.cs:line 153
   at System.Windows.Input.MouseEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

Thanks for help
Peter

[Zarko]

Hello Peter,
Thank you for the feedback! We are aware of this issue and it is already fixed. The fix will be available with the Q2 2011 SP and the next internal build.
If you have more questions feel free to ask.

All the best,
Zarko
the Telerik team