When switching themes on the Gnome desktop, the JComboBox foreground color does not change until the current value or a new value is selected, making the current value invisible in some cases.

To reproduce, start SwingSet2 with GTK L&F and select the ComboBoxDemo tab. From the desktop, switch to a theme with inverse colors, such as HighContrastLargePrintInverse. Notice how the combobox value is now painted white on white.

Suggestions for a workaround would be much appreciated. I have tried various ways to force a repaint from revalidate() but to no avail.