Hello, um a latest member of d mac family, bought a macbook air very recently.. getting to knw everything very nicely except one thing and that is when I play movies (xvid, divx, avi, wmv) on my macbook air, the quality of these movies are not great as it used to be on my windows laptop. can anyone help me on this matter? would really appreciate that. i've searched google thousand times about this sort of problem but neva found any soultion. so plz help me out asap