pppd active-filter outbound problem

[Bruno Wolff III]

I am having trouble running pppd using the active-filter outbound option.
I am using FC2 with some things from development, in particular:
ppp-2.4.2-3.1
libpcap-0.8.3-4
kernel-2.6.7-1.471
on a dual athlon system.

The error message I am getting is:
pppd: error in active-filter expression: inbound/outbound not supported on linktype 0

This makes it seem like either the kernel or ppp is checking the link
type before ppp has set the link type.