Before revision: The Barabasi-Albert model is a very popular model for creating random scale-free graphs . Despite its widespread use, there is a subtle ambiguity in the definition of the model and, consequently, the dependent models and applications.
After revision: The Barabasi-Albert model is a very popular model for creating random scale-free graphs but has been previously shown to have ambiguities in its definition. In this paper we discuss a new ambiguity in the definition of the model and, consequently, the dependent models and applications.