Joomla 2.5.6, Template: Clarion 1.2, RokNavMenu 1.13 still shows the same problem.
Also, the release notes from:
http://www.rockettheme.com/extensions-updates/1537-roknavmenu-113-j25-released
State:
"alias menu item not shown as active"
But "menu item alias" are still not shown as active (which is something I'm looking forward to as Kunena 2.0 requires an alias in order to display its menu, but that's a different story)! Looks like something went wrong here.
However, it perfectly works with "Module cache = OFF" at ximenia template.
One more thing I've noticed:
Hitting F5 to refresh the page also refreshes the menu at clarion. But it has no effect on ximenia (i.e. the menu is not refreshed) if caching is enabled.