As we've noted on other occasions, the problem of religious disagreement is a potential hot topic in philosophy of religion, as the slightly broader topic of reasonable disagreement is currently "hot" in epistemology. Here is another relevant data point in this regard: John DePoe (Ph.D. candidate, University of Iowa) has recently written a paper on the topic. Here is a link.
P.S. He has a number of other interesting papers in philosophy of religion (scroll down a little to find them).