I can confirm that this is a theme specific issue.
Themes without the bug: Clearlooks, Crux, Glider, Glossy, High Contrast Inverse, High Contrast Large Print Inverse.
Themes with the bug: Human, Mist.
I can confirm that this is a theme specific issue.
Themes without the bug: Clearlooks, Crux, Glider, Glossy, High Contrast Inverse, High Contrast Large Print Inverse.
Themes with the bug: Human, Mist.