I am having a lot of trouble using adduser on a RedHat 6.0 box. I also 
upgraded to the newest shadow-utils, but nothing changed:

I often use a shell script to add several users at once, but after some 
time, as the number of users grew, every time I add a new user, either by 
script or interactively, the /etc/group file gets corrupted: if the new 
user is also member of a group that already contains many users (in fact 
the number of users doesn't matter, the problem arises when the char count 
for the users in the group+the group name+the commas is greater than a 
fixed amount -8192-), then the user list for that group is broken, with 
several blank lines inserted, making user creation almost impossible.

I could not imagine what it is caused by, just was wondering if similar 
problems have already been reported.

Bye