Why would it be, you yourseld stated that you had the same behaviour? 

i dont think that this is the problem at infragisticas end. It is aat our end or Microsoft end.

Anyways Best of Luck

Regards

Asad 

 Thanks for the workaround, but I d like to know if there's a way to remove that from the designer, maybe some of the infragistics guys can give us a pointer.

 you are right same proble i faced when i made a user control and droped it on the form. infact if u see the form's designer filer there is also an other entry of the button due to which there are two buttons. the solution of this problem i applied in my aplication is that i created that button at run time in the constructor or control's Load event with designMode check. If problem exists let me know.

Thx and Regards

Asad 

Hi, I am trying to implement the solution you gave, I just ran into a tricky problem:

In the moment that I add the DropDownEditorButton to the EditorButtons collection, a combo like button appears, thats fine for me, but when I run the app, two buttons appear !

Is anything that has to be done to remove the extra button ?