Pressed state of equalizer button.
The pressed state of the equalizer button in the main window of VLC is missing when (Mountain) Lion's native full screen mode is active in the preferences.
The pressed state is shown with the non-native fullscreen mode dctivated (default), it's only missing with it disabled.
I've attached an image to show the issue.
There's also no enabled state in the default (non-native) mode. It's present in the app's resources (the blue-button state), but not shown when clicked.