When setting AllowFiltering="True" it's possible to filter the contents of the XamComboEditor. Unfortunately the horizontal scrollbar is not hidden automatically when all the elements have a smaller width than the width of the XamComboEditor. Even setting ScrollViewer.HorizontalScrollBarVisibility="Hidden" explicitely does not hide the horizontal scrollbar. I read and used some of the code in this topic: http://es.infragistics.com/community/forums/t/50144.aspx, but it did not solve my issue.

Attached you can find an example project to reproduce the problem. To reproduce: select the XamComboEditor and press "c". In the dropdown menu you can now view the horizontal scrollbar.

Thanks in advance