conntrack-tools-1.2.0 was released on 26/05/2012: "This release is a major milestone that includes support for expectation synchronization and the new nfct utility that, by now, only supports the new cttimeout infrastructure." For this to be committed, one would also need to commit libnetfilter_conntrack-1.0.1, which is out-of-date in portage. I shall be upgrading my production firewalls - which use conntrackd under heavy load - within the next few days. If there are any issues with this release, then I shall report back.
*** Bug 426882 has been marked as a duplicate of this bug. ***
conntrack-tools 1.2.2 is out http://www.netfilter.org/news.html#2012-07-31b
net-firewall/conntrack-tools-1.2.2 is in the tree.