Using ThemeManager.BeginUpdate() generates
"System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=SpinAngle; DataItem=null; target element is 'RotateTransform' (HashCode=49944607); target property is 'Angle' (type 'Double') "
It is often hard to track the source of output errors so we would apreciate if this one will not occur.