This bug is still existent in the official release of Mint 16 when choosing the fglrx driver in the driver manager.
Nevertheless, when setting the menu symbol to "/usr/share/mintsources/petra/icon.png" it is being displayed correctely.
As a side remark: The icon from the keyboard applet is also missing, if "display flags" is chosen. This could be somehow related to this bug.
This bug is still existent in the official release of Mint 16 when choosing the fglrx driver in the driver manager.
Nevertheless, when setting the menu symbol to "/usr/share/ mintsources/ petra/icon. png" it is being displayed correctely.
As a side remark: The icon from the keyboard applet is also missing, if "display flags" is chosen. This could be somehow related to this bug.