I think that bug #532633 it's related but not a duplicate. Bug #532633 wants to revert the order of the buttons when this bug is for the buttons place, not it's order. Anyway, they should fix both problems by RC, they are critical usability BUGs.
This bug is not in the light-theme nor Metacity... it's in the configuration made by Ubuntu developers.
I think that bug #532633 it's related but not a duplicate. Bug #532633 wants to revert the order of the buttons when this bug is for the buttons place, not it's order. Anyway, they should fix both problems by RC, they are critical usability BUGs.
This bug is not in the light-theme nor Metacity... it's in the configuration made by Ubuntu developers.