Partial error message: udevd:: RUN+="socket" support will be removed... Please remove from ..rules.d/40-multipath... Please remove it..
RUN+="socket:" will not do anything in Fedora 18. Users need to be converted to use libudev instead of doing synchronous calls with RUN.
Patch already proposed here: http://www.redhat.com/archives/dm-devel/2012-April/msg00022.html.
*** This bug has been marked as a duplicate of bug 805493 ***