Found a pre-release patch bug that I didn't notice before until I saw a thread about it earlier this afternoon. I lost the thread, but they said that their DV dragon couldn't be interacted with. The options were there, but the actions would cause their Sims to "freeze."
I have a dragon as well, so I tested this bug out. Turns out it only affects saved games; it doesn't affect new games.
However, I also noticed that it extended to my Magical Gnome. It wasn't jumping around or anything. My Sims couldn't even kick it over...
...until I renamed it.
Apparently, renaming Magical Gnomes and DV dragons resets them. I can only assume this may be true for all the objects that can be named by the player, like IF and minor pets (birds, turtles, snakes, etc.). Again, it's only for previously saved games. New games seem to be immune to this.
I'll be installing ITF on my next day off. I just wanted to test this bug out after finding out about it.