Midwest Algebra, Geometry and their Interactions Conference MAGIC05 University of Notre Dame, Notre Dame October 7-11, 2005 Quasicoherent and etale cohomological dimension of a scheme by Gennady LYUBEZNIK, University of Minnesota Abstract: We will discuss a counterexample to a long-standing open problem concerning a comparison between the quasicoherent and etale cohomological dimension of a scheme.