creating a snapshot with 5.2.1 RC2 doesn't work

RELENG_5_2 as of Feb 11, 8:00PM MST

When I issue the command:

dump -0Lauf - / > /nfsmounted/dest/dir/filename

I get the following output:

mksnap_ffs: //.snap: No such file or directory
dump: Cannot create //.snap/dump_snapshot: No such file or directory

my dmesg is:

Copyright (c) 1992-2004 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 5.2.1-RC2 #4: Thu Feb 12 00:06:08 MST 2004
    root_at_timber.efinley.com:/usr/obj/usr/src/sys/GENERIC
Preloaded elf kernel "/boot/kernel/kernel" at 0xc09e3000.
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Pentium II/Pentium II Xeon/Celeron (434.32-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x660  Stepping = 0

Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,
PAT,PSE36,MMX,FXSR>
real memory  = 402653184 (384 MB)
avail memory = 381440000 (363 MB)
Pentium Pro MTRR support enabled
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcibios: BIOS version 2.10
Using $PIR table, 7 entries at 0xc00fdf00
pcib0: <Intel 82443BX (440 BX) host to PCI bridge> at pcibus 0 on
motherboard
pci0: <PCI bus> on pcib0
pci_cfgintr: 0:13 INTA BIOS irq 10
pci_cfgintr: 0:15 INTA BIOS irq 11
agp0: <Intel 82443BX (440 BX) host to PCI bridge> mem 0xd0000000-0xd3ffffff
at device 0.0 on pci0
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 UDMA33 controller> port 0xf000-0xf00f at device 7.1 on
pci0
ata0: at 0x1f0 irq 14 on atapci0
ata0: [MPSAFE]
ata1: at 0x170 irq 15 on atapci0
ata1: [MPSAFE]
uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0xe000-0xe01f at
device 7.2 on pci0
uhci0: Could not allocate irq
device_probe_and_attach: uhci0 attach returned 6
piix0: <PIIX Timecounter> port 0x5000-0x500f at device 7.3 on pci0
Timecounter "PIIX" frequency 3579545 Hz quality 0
pci0: <display, VGA> at device 13.0 (no driver attached)
fxp0: <Intel 82558 Pro/100 Ethernet> port 0xe800-0xe81f mem
0xd5800000-0xd58fffff,0xd5910000-0xd5910fff irq 11 at device 15.0 on pci0
fxp0: Ethernet address 00:90:27:1a:2b:6f
miibus0: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
orm0: <Option ROM> at iomem 0xc0000-0xc7fff on isa0
pmtimer0 on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x64,0x60 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> at port
0x3f7,0x3f0-0x3f5 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode
ppbus0: <Parallel port bus> on ppc0
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
unknown: <PNP0303> can't assign resources (port)
unknown: <PNP0a03> can't assign resources (port)
unknown: <PNP0501> can't assign resources (port)
unknown: <PNP0700> can't assign resources (port)
unknown: <PNP0400> can't assign resources (port)
unknown: <PNP0501> can't assign resources (port)
Timecounter "TSC" frequency 434320695 Hz quality 800
Timecounters tick every 10.000 msec
GEOM: create disk ad0 dp=0xc3aac560
ad0: 43979MB <IBM-DTLA-307045> [89355/16/63] at ata0-master UDMA33
acd0: CDRW <LITE-ON LTR-52246S> at ata0-slave PIO4
Mounting root from ufs:/dev/ad0s1a
IP Filter: v3.4.31 initialized.  Default = pass all, Logging = enabled