ECN Forum Forums General Topics of the Trade Voice - Data - Video Discussion 568A or 568B ????

We use the Leviton Quickports for Data/Phone/CATV and follow the government standard of TIA-568-A. We also install network jacks and patch panels for small businesses. Several times we have been told by the computer installers or the IT people that we should be using 568-B, that 568-A does not work and we end up rewiring the jacks. (now we ask 1st) Which is correct/better????