What is the expected output? What do you see instead?
Pet Talented UI shows up

What version of the product are you using?
r353

Do you have an error log of what happened?
[17:14:28] Interface\AddOns\Talented\pet.lua:107 bad argument #1 to 'format' (string expected, got nil)
(tail call): ?
(tail call): ?
[C]: in function `format'
Interface\AddOns\Talented\pet.lua:107 in function `?'
...Ons\Ace3\CallbackHandler-1.0\CallbackHandler-1.0.lua:146 in function <...Ons\Ace3\CallbackHandler-1.0\CallbackHandler-1.0.lua:146
[string "safecall Dispatcher[2]"]:4: in function <[string "safecall Dispatcher[2]"]:4>
[C]: ?
[string "safecall Dispatcher[2]"]:13: in function `?'
...Ons\Ace3\CallbackHandler-1.0\CallbackHandler-1.0.lua:91 in function `Fire'
Interface\AddOns\Ace3\AceEvent-3.0\AceEvent-3.0.lua:70 in function <Interface\AddOns\Ace3\AceEvent-3.0\AceEvent-3.0.lua:69

Please provide any additional information below.