Whether, if the Blood is spilled, the Bread is still holy and may not be Redeemed: Pesachim 13b
Dedicating the loaves while they are in their dough state: Niddah 6b
Using Bread which isn't fully baked: Pesachim 37a-b
If one slaugtered the Lambs while he had eighty loaves: Menachot 48a
Whether loaves are needed for a thanks offering which is a replacement for a lost thanks offering, if the original is then found: Zevachim 9a; Temurah 18b