Same here. Did an yum --exclude=ORBit2 --exclude=ORBit2-devel updatetry upgrading yum to yum 2.1.4 and see if it makes any difference at
all.
I tried that both with yum 2.1.3 and also after an update to 2.1.4. Result were the same and also runing yum with '-d2' and '-d3' did not bring anything which would make me wiser.
Only after I guessed that ORBit2 packages may have something to
do with the problem, and exluding those in the first phase, allowed
me to proceed.