If Rarekiller works correct, he will dismiss the Pet before taming
And you can simply use "Tame by ID" to let him tame every bear or other tameable Mob in the WOW-World

for testing.
To the Bug with the unchecked Checkboxes when saving:
Try the following:
1. Uncheck the
Checkbox "Default Pullspell" (because the default pullspells had to be overworked for MOP)
2. in the
Textbox "Customized Pullspell" insert a Spell with which he should pull the Mobs.
Note: As Pullspell you need an instant spell without addiction to Combopoints, Seals, Rage or something else. (Addiction to Mana is ok)
Note 2: it have to be the original english name and check twice that the spelling is really correct

3. Make your other settings and save
--> Then he should save the settings. If not something else is wrong
(for Badwolf: It also could be, that the Function of Me.Hasspell("xxx") of HB has changed, but I don't think so)