openbsd has apparently done some work on isc's dhcp server would like to have that version available in portage Reproducible: Always Steps to Reproduce: 1. 2. 3.
ChangeLog snippet from dhcp-3.0.4b2 "Several minor bugs, largely relating to treating 8-byte time values as 4-byte entities, have been repaired after careful review of the FreeBSD ports collection's patch set. Thanks to the nameless entities who have contributed to the FreeBSD ports." If that's what you're referring to, I'll stick 3.0.4b2 in portage when 3.0.3-r1 goes stable OR 3.0.4 if it gets released first.
net-misc/dhcp-3.0.4_beta2 has been added to portage ~ARCH and p.masked which should fix this bug.