I have a Combobox in a grid. When I select an item in the combo box its blank, when I go to the next row it shows the displayvalue. This is driving me nuts.

This is a known issue when the column is bound to an integer foreign key and the combo's RowSOurceType is either 6-fields or 2-alias. Change it to either 3-SQL (My preference) or 5-Array and it will resolve your peoblem.