The Metro theme isn't properly applied on the RadOutlookBarItems if it is set in the RadOutlookBar definition: <telerik:RadOutlookBar telerik:StyleManager.Theme="Metro" />
Hi, The observed issue has already fixed in Telerik UI for WPF/Silverlight, version Q3 2014 (2014.3.1021). It is available in the newer version of the controls. Best regards, Ralitsa Kumanova