WowAce

What is the issue?
I recently re-did my interface. I'll add a few pictures below. But what happens is, when I use a mount and the mounting cast has finished I get a short screen freeze. I found out that it only happened with the DogTag string [HappyText]. When I removed that DogTag from the pet's UF, the screen didn't freeze anymore.

Please provide any additional information below.
The complete string I used is [Outline][HappyText:Truncate(1, nil)]. The version of Pitbull I am using is 3.2.14
http://www2.picturepush.com/photo/a/2247925/1024/Warcraft/problem.jpg - picture (The "H", between "Draig" and "100%" is the HappyText)
http://www1.picturepush.com/photo/a/2247924/1024/Misc.-stuff/addons.png - AddOns I'm using (red dots show which ones were turned off)