sparc 5.2-beta bsd.rd doesn't get IP address from DHCP

Hi,

just tried to install from the fresh 5.2-beta bsd.rd, but it doesn't get an IP address via DHCP.
It seems to have a problem to detect the link on the le0 interface.
Booting back with the 5.1-current, normal bsd GENERIC, it just works.
see both dmesgs below.

Rebooting with command: disk bsd.rd                                   
Boot device: /iommu/sbus/espdma@5,8400000/esp@5,8800000/sd@3,0  File and args: bsd.rd
>> OpenBSD BOOT 2.6
Booting bsd.rd
Loading at physical address 400000
3329948+409020=0x390ea0
console is ttya
Copyright (c) 1982, 1986, 1989, 1991, 1993
        The Regents of the University of California.  All rights reserved.
Copyright (c) 1995-2012 OpenBSD. All rights reserved.  http://www.OpenBSD.org

OpenBSD 5.2-beta (RAMDISK) #9: Wed Jun 27 18:30:54 MDT 2012
    [email protected]:/usr/src/sys/arch/sparc/compile/RAMDISK
real mem = 200937472 (191MB)
avail mem = 193236992 (184MB)
mainbus0 at root: SUNW,SPARCstation-5
cpu0 at mainbus0: MB86907 @ 170 MHz, on-chip FPU
cpu0: 16K instruction (32 b/l), 16K data (32 b/l), 512K external (32 b/l) DVMA coherent cache enabled
obio0 at mainbus0
clock0 at obio0 addr 0x71200000: mk48t08 (eeprom)
timer0 at obio0 addr 0x71d00000 delay constant 82
zs0 at obio0 addr 0x71100000 pri 12, softpri 6
zstty0 at zs0 channel 0: console
zstty1 at zs0 channel 1
zs1 at obio0 addr 0x71000000 pri 12, softpri 6
zskbd0 at zs1 channel 0: no keyboard
zstty2 at zs1 channel 1: mouse
slavioconfig at obio0 addr 0x71800000 not configured
auxreg0 at obio0 addr 0x71900000
power0 at obio0 addr 0x71910000
fdc0 at obio0 addr 0x71400000 pri 11, softpri 4: chip 82077
iommu0 at mainbus0 addr 0x10000000: version 0x5/0x0, page-size 4096, range 64MB
sbus0 at iommu0: 21.250 MHz
dma0 at sbus0 slot 5 offset 0x8400000: rev 2
esp0 at dma0 offset 0x8800000 pri 4: ESP200, 40MHz
scsibus0 at esp0: 8 targets, initiator 7
cd0 at scsibus0 targ 2 lun 0: <MATSHITA, CD-ROM CR-504, ST23> SCSI2 5/cdrom removable
sd0 at scsibus0 targ 3 lun 0: <IBM, DCAS32160SUN2.1G, S60B> SCSI2 0/direct fixed serial.IBM_DCAS32160SUN2.1GF2583160_
sd0: 2063MB, 512 bytes/sector, 4226725 sectors
"SUNW,bpp" at sbus0 slot 5 offset 0xc800000 not configured
ledma0 at sbus0 slot 5 offset 0x8400010: rev 2
le0 at ledma0 offset 0x8c00000 pri 6: address 08:00:20:89:d9:b5
le0: 16 receive buffers, 4 transmit buffers
"SUNW,CS4231" at sbus0 class serial slot 4 offset 0xc000000 not configured
"power-management" at sbus0 slot 4 offset 0xa000000 not configured
cgsix0 at sbus0 slot 3 offset 0x0 pri 9: SUNW,501-2325, 1152x900, rev 11
wsdisplay0 at cgsix0
wsdisplay0: screen 0 added (std, sun emulation)
bootpath: /iommu@0,10000000/sbus@0,10001000/espdma@5,8400000/esp@5,8800000/sd@3,0
root on rd0a swap on rd0b dump on rd0b
erase ^?, werase ^W, kill ^U, intr ^C, status ^T

Welcome to the OpenBSD/sparc 5.2 installation program.
(I)nstall, (U)pgrade or (S)hell? i
At any prompt except password prompts you can escape to a shell by
typing '!'. Default answers are shown in []'s and are selected by
pressing RETURN.  You can exit this program at any time by pressing
Control-C, but this can leave your system in an inconsistent state.

Terminal type? [sun] 
System hostname? (short form, e.g. 'foo') warbird

Available network interfaces are: le0.
Which one do you wish to configure? (or 'done') [le0] 
IPv4 address for le0? (or 'dhcp' or 'none') [dhcp] 
Issuing hostname-associated DHCP request for le0.
le0: no link ............. sleeping
Issuing free-roaming DHCP request for le0.
le0: no link ............. sleeping
Available network interfaces are: le0.
Which one do you wish to configure? (or 'done') [le0] 

>> OpenBSD BOOT 2.6
Booting bsd
Loading at physical address 400000
3237020+481972 [52+150528+132973]=0x3d1468
[ using 283928 bytes of bsd ELF symbol table ]
console is ttya
Copyright (c) 1982, 1986, 1989, 1991, 1993
        The Regents of the University of California.  All rights reserved.
Copyright (c) 1995-2012 OpenBSD. All rights reserved.  http://www.OpenBSD.org

uvm_km_kmem_grow: grown to 0xfe000000
OpenBSD 5.1-current (GENERIC) #62: Sun May 27 12:05:06 MDT 2012
    [email protected]:/usr/src/sys/arch/sparc/compile/GENERIC
real mem = 200933376 (191MB)
avail mem = 192966656 (184MB)
mainbus0 at root: SUNW,SPARCstation-5
cpu0 at mainbus0: MB86907 @ 170 MHz, on-chip FPU
cpu0: 16K instruction (32 b/l), 16K data (32 b/l), 512K external (32 b/l) DVMA coherent cache enabled
obio0 at mainbus0
clock0 at obio0 addr 0x71200000: mk48t08 (eeprom)
timer0 at obio0 addr 0x71d00000 delay constant 82
zs0 at obio0 addr 0x71100000 pri 12, softpri 6
zstty0 at zs0 channel 0: console
zstty1 at zs0 channel 1
zs1 at obio0 addr 0x71000000 pri 12, softpri 6
zskbd0 at zs1 channel 0: no keyboard
zsms0 at zs1 channel 1
wsmouse0 at zsms0 mux 0
slavioconfig at obio0 addr 0x71800000 not configured
auxreg0 at obio0 addr 0x71900000
power0 at obio0 addr 0x71910000
fdc0 at obio0 addr 0x71400000 pri 11, softpri 4: chip 82077
iommu0 at mainbus0 addr 0x10000000: version 0x5/0x0, page-size 4096, range 64MB
sbus0 at iommu0: 21.250 MHz
dma0 at sbus0 slot 5 offset 0x8400000: rev 2
esp0 at dma0 offset 0x8800000 pri 4: ESP200, 40MHz
scsibus0 at esp0: 8 targets, initiator 7
cd0 at scsibus0 targ 2 lun 0: <MATSHITA, CD-ROM CR-504, ST23> SCSI2 5/cdrom removable
sd0 at scsibus0 targ 3 lun 0: <IBM, DCAS32160SUN2.1G, S60B> SCSI2 0/direct fixed serial.IBM_DCAS32160SUN2.1GF2583160_
sd0: 2063MB, 512 bytes/sector, 4226725 sectors
bpp0 at sbus0 slot 5 offset 0xc800000: DMA2
ledma0 at sbus0 slot 5 offset 0x8400010: rev 2
le0 at ledma0 offset 0x8c00000 pri 6: address 08:00:20:89:d9:b5
le0: 16 receive buffers, 4 transmit buffers
audiocs0 at sbus0 slot 4 offset 0xc000000 pri 9
audio0 at audiocs0
"power-management" at sbus0 slot 4 offset 0xa000000 not configured
cgsix0 at sbus0 slot 3 offset 0x0 pri 9: SUNW,501-2325, 1152x900, rev 11
wsdisplay0 at cgsix0 mux 1
wsdisplay0: screen 0 added (std, sun emulation)
vscsi0 at root
scsibus1 at vscsi0: 256 targets
softraid0 at root
scsibus2 at softraid0: 256 targets
bootpath: /iommu@0,10000000/sbus@0,10001000/espdma@5,8400000/esp@5,8800000/sd@3,0
root on sd0a (767d44393957fabc.a) swap on sd0b dump on sd0b
Automatic boot in progress: starting file system checks.
/dev/sd0a (767d44393957fabc.a): file system is clean; not checking
/dev/sd0e (767d44393957fabc.e): file system is clean; not checking
/dev/sd0d (767d44393957fabc.d): file system is clean; not checking
setting tty flags
pf enabled
starting network
DHCPREQUEST on le0 to 255.255.255.255 port 67
DHCPACK from 10.0.0.27 (00:00:24:c9:d4:98)
bound to 10.0.0.25 -- renewal in 21600 seconds.
starting early daemons: syslogd pflogd ntpd.
starting RPC daemons:.
savecore: no core dump
...