http://bugs.winehq.org/show_bug.cgi?id=58914
--- Comment #6 from Bart Kindt info@sartrack.nz --- Update: If I afterwards walk through the Items in the Combobox, it has indeed entered an _empty_ entry at the index where the value "EOC" should be.
It is not a display issue. It has entered an empty field/string at that index.
Note that I use this window as the working example. This issues is all over the program in many places. And always at the same index in these Comboboxes.