Freezable Warning in Debug output window

System.Windows.Freezable Warning: 4 : CanFreeze is returning false because at least one DependencyProperty on the Freezable is animated.; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='31242739'; Freezable.Type='System.Windows.Media.TranslateTransform'

I get this warning when I change selection in a combo box (or just click on the arrow to open the drop-down). I am using Animations and some translations but nothing related to where I am getting these warnings.

TIA.
 - St