A bug in the v1.0.3 patch largely broke the Witch Doctor’s Zombie Bears rune effect by introducing pathfinding issues that causes the bear-valanche to not work on slopes, and to stop when it hits any tiny obstacles. There’s good news though, as a fix is coming soon™.
This patch does not have a release date yet, but it will be releasing in the near future (as in before 1.0.4) 🙂
Yes, soon… but when? Sometimes the waiting is just unbearable.