Very relevant post about recent observations:
My body doesn't tolerate wheat too well. I've noticed it time and time again. Every time I eat something with white flour, like bread, pasta and stuff like that, my stomach gets very upset and clearly mad. No such problems with oat tho. Which is awesome, because it's a solid part of my pre and post workout nutrition. I quess I'll live without bread then. I migth try 100% oat bread at some point.
sounds like http://en.wikipedia.org/wiki/Gluten_sensitivity