smbfs.ko regression?

Has anyone else had trouble with smbfs.ko/samba mounting recently?

I upgraded to r194428 today, and on reboot noticed that the computer  
had hanged (i.e. took way too long to boot), so I plugged a monitor in  
and noticed that it had hanged on loading the smbfs module/mounting a  
smbfs share, and then the same thing happened on "mounting late  
filesystems" (dmesg -a | grep late returns nothing now that it works,  
BTW). IIRC it dropped to single-user due to "/etc/rc returing an  
error" or something to that matter. I commented the line out in fstab  
and did an "exit" and it came up from single user beautifully.
The error appears to be a bit random and I haven't been able to  
reproduce it, but it happened two or three times so it wasn't just a  
one-off. It did print some kind of error, but I guess there's no way  
of getting at that now?

On a similar note, I can't kldunload it, either. The computer just  
freezes - it responds to ping, but not SSH input, and not keyboard  
input either (not even drop to debugger). I can't find a way out  
except to reset it. I don't really care too much about this part, but  
freezes are bad. Needless to say I can't provide a backtrace or  
similar - is there anything I can do to help? Still, the main issue,  
and question, is regarding the *loading*.

[root_at_chaos ~]# mount|grep smbfs
//SERENITY_at_EXSCAPE/FBSDBACKUP on /mnt/backup (smbfs)
[root_at_chaos ~]# umount /mnt/backup
[root_at_chaos ~]# mount|grep smbfs
[root_at_chaos ~]# kldstat
Id Refs Address            Size     Name
  1   21 0xffffffff80100000 e61c98   kernel
  2    1 0xffffffff80f62000 50ae98   zfs.ko
  3    2 0xffffffff8146d000 7988     opensolaris.ko
  4    1 0xffffffff81475000 3378     accf_http.ko
  5    1 0xffffffff81479000 4278     amdtemp.ko
  6    1 0xffffffff81622000 722e1    smbfs.ko
  7    2 0xffffffff81695000 6694     libiconv.ko
  8    2 0xffffffff8169c000 1740     libmchain.ko
[root_at_chaos ~]# kldunload smbfs
After quite a while: Read from remote host 192.168.1.10: Connection  
reset by peer

"kldunload amdtemp" succeeds, by the way.

Regards,
Thomas