Dave,

Did you break it in half over your knee? <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />

After several "accidents" the bolt, attaching the yoke to the crossbar can get bent. Also look at the plastic washers, or lack there of. We like to use the old style crossbar slop kit washers with round side to match the crossbar and flat surface to mate with the yoke. Tightens things up considerably.