Both tcpdump and libpcap are out of date with respect to current versions. This requests updating. tcpdump to 3.6.2 and libpcap to 0.6.2.
3.6.2 .src.rpm is available at http://www.netcore.fi/pekkas/linux/ipv6/. It also supports (surprise, surprise! :-) ipv6 natively. I've ported a lot old patches and behaviour to this version, so it should be quite close to what RH is currently using. There are a few differences though.
*** Bug 37283 has been marked as a duplicate of this bug. ***
tcpdump-3.6.2-3 in rawhide, as soon, as it gets synced