You might get a bit more targeted exposure for your problem if you post to the mrepo mailing list[1]. I seem to recall someone posting about this issue recently[2]. No responses yet however...
[1] http://lists.rpmforge.net/mailman/listinfo/tools [2] http://lists.rpmforge.net/pipermail/tools/2009-September/001532.html
thanks - did not know there was an mrepo list