[RC1] Login not possible

Hi,

I am trying to migrate a 5.1-RELEASE machine to a 5.2-RC1. I have 
discovered that the following passage in /etc/group stops me (kjwolf) 
from logging in. I had copied it directly from my old group file. The 
error message is the one attached below. I don't get more info. To me, 
that's kind of funny.

kjwolf:*:1000:kjwolf
mwolf:*:1001:mwolf
wolf:*:1200:kjwolf,mwolf
wstaff:*:2000:kjwolf
mm:*:2001:kjwolf,mwolf
develop:*:2002:kjwolf
classifd:*:2003:kjwolf
mirror:*:2004:kjwolf
mirrors:*:2005:kjwolf
sw:*:2006:kjwolf
yanestra:*:2007:kjwolf
coll:*:2008:
lusers:*:2009:
exusers:*:2010:

Dec 12 21:37:24 golulu login: setusercontext() failed - exiting

_With_ those lines in /etc/group, id gives:

uid=1000(kjwolf) gid=20(staff) groups=20(staff), 0(wheel), 5(operator), 
13(games), 68(dialer), 69(network), 100(users), 1000(kjwolf), 
1200(wolf), 2000(wstaff), 2001(mm), 2002(develop), 2003(classifd), 
2004(mirror), 2005(mirrors), 2006(sw)

Regards,
k.j.