This is #330673.
From the 1.9-1 changelog:
* Fix /etc/network/if-up.d/ip to not set rp_filter to 1 when it isn't
configured. (Closes: #330673) [debian/ip-if-up]I'm willing to prepare a SPU upload if the release team desires so. I agree that it's an important bug when installing a package breaks your network, I'm not sure whether it's suitable for stable though; it is still unlikely that someone fiddles with VLANs without local access. -- Loïc Minier <[EMAIL PROTECTED]>
