Steps to Reproduce:
1.apt-get-install kernel-image-std-up#2.4.26-alt6
kernel-image-std-up#2.4.26-alt13 kernel-image-std-up#2.4.32-alt... (Sisyphus)
2.boot 2.4.26-alt6
3.echo "aggregate 1024-65535  into 65535;" >>/etc/ipcad.conf
4.chkconfig ipcad on&&service ipcad start # ps auxc|grep ipcad show "ipcad"
4.boot 2.4.26-alt13 or 2.4.32-...
5.ps auxc|grep ipcad show nothing # last message in /v/l/messages: "ipcad
startup succeeded".
6. perl -i -walpe's/^(aggr)/#$1/' /etc/ipcad.conf
7. boot any of mentioned kernels: ipcad work.

ipcad.conf:
=======================
capture-ports disable;
buffers = 1024k;
interface ulog group 1; # Use ULOG, do not disable NetFlow.
netflow export destination 127.0.0.1 5555;
netflow export version 5;       # NetFlow export format version {1|5}
netflow timeout active 30;      # Timeout when flow is active, in minutes
netflow timeout inactive 15;    # Flow inactivity timeout, in seconds
/* Note the order! */
chroot = /var/lib/ipcad;
pidfile = ipcad.pid;
memory_limit = 32m;
#aggregate 1024-65535  into 65535;
=======================
R -q ipcad:
ipcad-3.6.6-alt1.M24.1

P.S.: binary package was build in analogious system with 2.6.14-std26-up-alt5
kernel. Packages iptables-1.2.11-alt3 and libpcap-0.8.2-alt2 identical on both
systems (M24+updates+ipcad from backports).

Actual Results:  
Ipcad won't work with aggregation even on different builds on one kernel.

Expected Results:  
Ipcad will work with aggregation on any kernel (It not depends (?) on kernel code).