conf/164271: not working pf nat on FreeBSD 9.0

[yuriy]

>Number:         164271
>Category:       conf
>Synopsis:       not working pf nat on FreeBSD 9.0
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jan 18 06:30:10 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     yuriy
>Release:        FreeBSD 9.0 Release
>Organization:
IT/IS/Operations
>Environment:
FreeBSD router 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Tue Jan 17                                     11:14:34 EET 2012 yuriy at router:/usr/obj/usr/src/sys/MY  i386

>Description:
NAT does not work in pf. Help please! Given: FreeBSD 9.0 Release .. included in the core pf ..
Simple rules:
pf.conf
#################################
int_if="dc0"
ext_if="tun0"
set skip on lo0
scrub in
nat on $ext_if from 10.25.1.0/24 to any -> ($ext_if)
pass all
#################################
On FreeBSD 8.2 works without problems.
On FreeBSD 9.0 dont work.
>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: