This shiur based on the first pasuk in the parsha - discusses the importance of details.  

Sources: Rash, Taz, E.Ezra, R.Bechayey, Ramban, Tur, Yalkut, Alshich, Rikanti,

A Ma'amar and a Sicha - Bamidbar Sinai B'Ohel Moed B'echod L'Chodesh, B'Shana Hasheinis

references to follow