Sheldon is seen fretting over the risk of opening sparkling wine. He apparently forgot that in The Champagne Reflection (2014), he had no issues opening a fifty-year-old bottle that the rest of the guys found in a deceased colleagues office, and were planning to save.
When Sheldon and Stuart are complimenting one another, the amount of mimosa in Sheldon's glass changes between shots, decreasing and increasing.
At the end, Sheldon and Stuart toast a comment by clinking glasses. However, in The Roommate Transmogrification (2011), Sheldon tells Raj and Penny that he dislikes clinking of glasses.