When Cam is explaining to Brennan about the salt and pepper shakers, the bear she has is light in color and has its paws raised up by its face. When Cam is speaking to Michelle in the next scene, the shaker she reveals as her half is darker in color and has its paws lower down. When Michelle descends the stairs and places her shaker on the table next to Cam's, its the light colored one from the previous scene with Brennan.
When Angela shows Bones a forensic recreation of the attack, she says that the weapon would be about 5 feet long and 10cm (4 in.) wide. When the weapon is found, it is indeed about 5 feet long but is only about 4cm (1 1/2in.) wide.
If Angela's description of the murder weapon being an iron bar five feet long and 10cm in diameter was correct it would have weighed 213.6 pounds.