Weird error in 4.2.4RC2

[Eustace, Glen]

I am getting lots of the following error in our logs.

Jun 27 10:52:01 tur-net1 dhcpd: ddns.c(1510): Failed to update internal lease structure with DDNS control block. Existing ddns_cb structure does not match expectations.IPv6=2001:4530:2:d01::1:3df, old ddns_cb=0x22dc6a20, triedto update to new ddns_cb=0x22dc6a20

I can't see why this is an error, the cb addresses look the same to me :-(
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Glen Eustace, Infrastructure Developmenet Engineer (BC/DR)
Information Technology Service, Massey University PN460
Tennent Drive, Palmerston North, New Zealand
Ph: +64-6-3569099 x 81005, Fax: +64-6-3505607, Mob: +64-27-4500321
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