Part of my old anti-Catholicism was that I was always bothered greatly by transubstantiation, offended might even qualify, based on two things:
1-There's nothing Biblical about it, unless you inexplicably insist on a completely literal reading of a metaphor that even the standard Biblical literalists (like jmfcst) don't and...
2-The idea that it can only happen if someone who was "properly" ordained (oh and they have to be male too) says some Latin words over the elements. Really that strikes me as incredibly contrived and reminiscent of this:
http://tvtropes.org/pmwiki/pmwiki.php/Main/HandWaveWhat I find pretty odd is that the people insisting on things like Young Earth Creationism and speaking in tongues are also more reasonable and logical here with the memorialism.