BTW, this is also fixable by installing compizconfig-settings-manager and setting the "Prev window" key binding in the "Static Application Switcher" plugin config (it's disabled by default). I don't know if that configurator is tweaking the Metacity gconf db behind the scenes, but it seems to allow arbitrary key bindings rather than just re-enabling the reverse switching.
Another +1 to an SRU.
BTW, this is also fixable by installing compizconfig- settings- manager and setting the "Prev window" key binding in the "Static Application Switcher" plugin config (it's disabled by default). I don't know if that configurator is tweaking the Metacity gconf db behind the scenes, but it seems to allow arbitrary key bindings rather than just re-enabling the reverse switching.