ipnat memory leak?

[Vector]

I was using ipfw and natd but I wanted to move nat into the kernel so I
recompiled with ipfilter and ipnat.  Now, after terminating natd, and
setting up ipnat rules in /etc/ipnat.rules, I see memory increase at a rate
of just under 1MB per minutes.  Has anyone else seen a memory leak in ipnat
or ipfilter?

vec