Valid (syntax) valid users

Hi,

I am using LDAP to restrict access to a certain location.

<Directory "/local/home/subversion/viewvc/bin/cgi/">

AllowOverride None

Require valid-user

# LDAP
AuthType Basic
AuthName "ID/BD SVN repository"
AuthBasicProvider ldap
AuthLDAPURL
"ldaps://ldaps01.example.com/ou=users,ou=id,ou=auth,o=***,c=***?
uid?one?(objectClass=*)"
AuthLDAPBindDN
"CN=linuxlo_proxy,OU=admins,OU=id,OU=auth,O=***,C= ***"
AuthLDAPBindPassword "********"

</Directory>

this works worked well until today when a new user told me she was
unable to access the location.

In the log files I find:

[Thu Mar 13 16:05:31 2008] [error] [client ********] access to /
viewvc/******** failed, reason: user 'eth.yahyasb' does not meet
'require'ments for user/valid-user to be allowed access

Now this works for hundreds of users without any problem.

I checked the user with ldapsearch and it's correctly on the LDAP
server.

The only strange thing is the dot "." in the user name. Is it allowed?
It is no problem for the LDAP server and for our Linux machines.

Many thanks,

Matteo