:-( Never heard of such a problem.
What version?
Is there anything special about this combobox?
What container is it in?
What are it's properties set to?
Anything in the MouseOver event?
Have your tried deleting it and recreating it from scratch?
Has it always done this?

>I have a combobox that has a data source of fields from a table. When I pull down the drop down list from the combobox and run the mouse over the data, the data values change. Can someone tell my what is happening?