I have a bizarre issue with my wpf 3.5 app that I just wrote. One of the computers we installed it on won't allow the user to select an item from the combobox with the mouse. The mouse can make the drop down appear like normal, but when the mouse hovers over the items they are not highlighted and clicking on one closes the drop down but doesn't select the item. This is the default combobox with no style and only the margin, itemssource and selecteditem properties set. I tried other programs that have comboboxes (IE7, Excel, a VB6 app) and all of them work just fine. We have this program installed on numerous computers throughout our company and everyone else's is working correctly. I tried uninstalling the program and the .NET framework then reinstalling. I don't know what else to try.
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