Looks like we can't reproduce the issue or there's a problem in the test case provided.
Touch Premium Member
TabPanel no Card Switch Animation
Sorry for creating a dublicate( http://www.sencha.com/forum/showthre...itch-Animation )
But I never got an answer if/or/when it will be fixed? Its very importent to me because it has a lot to say about the feeling/performance of an application. If the views are large the animation slows down the speed a lot so I always have it set to 'false' it makes the application feel a lot snappier.
Thanks for the bump, somehow we hadn't pushed this thread into our bug tracking system.
Looking to get it addressed next sprint.