5.2.1-RC2: CardBus RealTek 8139 based NIC stop working during cvsup

Hi.

I installed 5.2.1-RC2 on a Dell Latitude CP notebook based on Pentium 
MMX 233MHz processor with 128Mb of RAM. There is one cardbus NIC based 
on RealTek 8139 chip. This is a Planet ENW-3504FC CardBus NIC. When I 
run 'cvsup my-supfile' the NIC is stop working short time after it 
started to update the first collection:

I can't ping any host of my LAN or any other but I can ping my self host 
locally. No external host can ping me too. It continue to not work even 
after I stoped cvsup. To make the NIC work I can do ether:
1. run /etc/rc.d/netif restart
or
2. enable or disable promiscuous mode on the NIC by running or stoping 
tcpdump.

Following are parts of `dmesg` and `ifconfig -a` related to this NIC:

rl0: <RealTek 8139 10/100BaseTX> port 0x1000-0x10ff mem 
0x88002000-0x880021ff irq 11 at device 0.0 on cardbus1
rl0: Ethernet address: 00:30:4f:29:38:35
miibus0: <MII bus> on rl0
rlphy0: <RealTek internal media interface> on miibus0
rlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto


rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
         options=8<VLAN_MTU>
         inet 192.168.1.5 netmask 0xffffff00 broadcast 192.168.1.255
         inet6 fe80::230:4fff:fe29:3835%rl0 prefixlen 64 scopeid 0x3
         ether 00:30:4f:29:38:35
         media: Ethernet autoselect (100baseTX <full-duplex>)
         status: active


Interesting, how cvsup could make the NIC to stop working? I tried to 
use 'hint.acpi.0.disabled="1"' but it didn't help.