-current panic: ffs_valloc: dup alloc

Hi,

   On a newly installed 20030729-CURRENT system, the system panic'd
during a pkg_add. Note the mode/inum/fs at the end of the Fetch line.

# pkg_add -r zsh
Fetching ftp://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-current/Latest/zsh.tbz...mode = 0177560, inum = 48, fs
= /var
panic: ffs_valloc: dup alloc
Debugger("panic")
Stopped at      Debugger+0x54:  xchgl   %ebx,in_Debugger.0
db> t
Debugger(c052dc4b,c05f0440,c053fc70,e6a22888,100) at Debugger+0x54
panic(c053fc70,ff70,30,cb1438d4,8124) at panic+0xd5
ffs_valloc(cb3f37fc,8124,cb285c80,e6a228e0,40) at ffs_valloc+0x175
ufs_makeinode(8124,cb3f37fc,e6a22bec,e6a22c00,a02) at ufs_makeinode+0x69
ufs_create(e6a22a68,e6a22b24,c039115e,e6a22a68,e6a22a64) at ufs_create+0x39
ufs_vnoperate(e6a22a68,e6a22a64,2,0,caa87d10) at ufs_vnoperate+0x18
vn_open_cred(e6a22bd8,e6a22cd8,124,cb285c80,4) at vn_open_cred+0x19e
vn_open(e6a22bd8,e6a22cd8,124,4,c05f3810) at vn_open+0x30
kern_open(caa87d10,80de050,0,a02,124) at kern_open+0x144
open(caa87d10,e6a22d10,c0548bdf,3ee,3) at open+0x30
syscall(2f,2f,2f,80de060,a01) at syscall+0x273
Xint0x80_syscall() at Xint0x80_syscall+0x1d
--- syscall (5, FreeBSD ELF32, open), eip = 0x80623bf, esp = 0xbfbff9cc, ebp = 0xbfbffbb8 ---


   I have the system on a serial console, so if I can provide any useful info
in the next few hours please let me know. dual xeon/4G/Generic kernel/all
disks on aac0.

Thanks!
-John