Upon merging latest code from our main development branch I realized that every edit-enabled RadComboBox on our application had vanished. We use the Windows 7 theme via implicit styles with UI for WPF 2015.3.1104.45. VS 2015's Live Visual Tree showed the controls and all simple combo boxes (no editing) worked as normal. I went back in time until I found the changeset that broke the code and found that the references had indeed changed but not in any way that seems like it should break anything. I compared loaded modules for the working code and the broken code and the exact same Telerik assembly dll's are loaded from the exact same location. As best I can tell ONLY combo boxes are not drawing. I keep thinking I am missing something really obvious here. Any ideas?