Such as dark sheik/Zelda freeze when transforming into them
Chaotix says he fixed that. (Dunno if it's true since I haven't checked.)
Anyway, as to the original question, I'll just copy and paste an IM conversation I had earlier. Should shed some light.
(9:57:28 PM) Vyse: No, [the new code] has trouble loading things along with music
(9:57:31 PM) Vyse: Music loads fine
(9:57:39 PM) Vyse: It just messes with other things that load once the music starts
(9:57:42 PM) Vyse: Thus
(9:57:49 PM) Vyse: Battle portraits and transformations.
(9:58:12 PM) Shadow: That's what I meant.
(9:58:23 PM) Shadow: I believe that'll be impossible.
In other words, once the code starts constantly loading from the card (to play the music), maybe loading other stuff is too much of a strain? Or maybe it's just a glitch. *shrug*