also-notify and nsupdate doesnt work

[jonny at hasig.de]

hi,
i have a setup with one normal and some hidden slaves.
i set up a zone with also-notify and all worked fine.
all slaves got notifies and updates.
now i added a key and policy to remote update the zone.
the updates with nsupdate woks fine.
but the notify is only sent to the slave, but not to the hidden slaves.
so just the master and official slave is up to date.

how can i change that?

i use BIND 9.8.4-rpz2+rl005.12-P1 on debian wheezy...

tia
jonny