'''What steps will reproduce the problem?'''

1. Cast Feral Spirit
2. Use ability Spirit Walk while slowed by Slow, Frost bolt, Frost shock.... etc.

'''What is the expected output? What do you see instead?'''
-Shaman is still slowed, only +60% movement speed works (but slowed)
-Removes all movement impairing effects (this part doesnt work)
-Shaman and Wolves also must get 4 second imunity to these effects after cast of Spirit Walk

'''Additional information.'''
Feral Spirit - http://www.wowhead.com/spell=51533#comments
Spirit Walk - http://www.wowhead.com/spell=58875#comments
Spirit Walk imunity buff - http://www.wowhead.com/spell=58876

'''What revision of the Core are you using? On what operating system?'''
Core revision: Trinity Core 10969+ Operating System: Ubuntu 10.04 x64