Uncanny Dodge

This class feature is gained by Barbarians at 2nd level and by Rogues at 4th level.

Activating this ability provides a temporary (15 seconds) modifier of +4 Armor Class and +4 to reflex saving throws.

If a Barbarian or Rogue already has uncanny dodge from a different class, he doesn't gain Improved Uncanny Dodge instead, but a second time uncanny dodge. This was reported as a bug and is investigated.