When Tom is jokingly looking up new houses for him and Leslie, he moves to her desk and puts his hand on her arm. In the wide shots he has his right hand on her, but in the close up it's his left.
When the characters are in the health food store "Grain N Simple", among the store's prop signs, a Henry's sign can clearly be seen in the background.
In between takes where Ron is throwing out the "bacon", the trash can next to the sample stand can be seen missing in one take, and then back in the next.
There is a typo on the cover of the women's magazine that Joe from sanitation is reading; a title reads "Organic Home Vegie Garden" instead of "Veggie".
Ann isn't wearing gloves when she is drawing Leslie's blood--this is a huge no-no.