0.70 is a bugfix release to 0.69
from the announcement on the zebra mailinglist:
I've just fixed critical bug of zebra's routing information base
calculation which introduced in zebra-0.69. ospfd bugs which causes
core dump are also fixed. Configuration search path bug is fixed by
NAGUCHI kay. RIPng in filter bug is fixed by itojun.
* Changes in zebra-0.70
* Changes in zebra
** Critical routing information base calculation bug check is fixed.
** zebra ipv4 message is extended to support external/internal route flavor.
** Now if internal route doesn't has direct connected nexthop, then nexthop
is calculated by looking up IGP routing table.
* Changes in bgpd
** `neighbor PEER update-source IFNAME' command added as ALIAS to
`neighbor PEER interface IFNAME'.
* Changes in ospfd
** DD null pointer bug is fixed.
