To change the syntax colouring (or coloring if you swing that way) to a language in a submenu you must click the submenu title. If you simply hover over the submenu title to open the submenu, the selection is not applied.
Works: Current Language Syntax (Click) -> Python Submenu Title(Click) -> Python (Click)
Broken: Current Language Syntax (Click) -> Python Submenu Title (Hover) -> Python (Click)
Running Ubuntu 12.04 with Unity (<- that could be the problem there). Confirmed on two machines.
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