WordPress MU

When my individual blog users hit the "Lost your password?" link they are getting the message:

"Password reset is not allowed for this user"

Does it have something to do with roles?

Can't find this setting in the documentation anywhere...

Never seen that before... o_O

Are the clicking the lost password link on the wp-login.php page on the main blog?

Sounds like you have a plugin installed that affects this. Here are a few I think do:
login lockdown
ldap
limit logins
shibboleth

I'm sure there are others.

yes andrea, it is
http://subdomain.domain.edu/subblog/wp-login.php

deanna, we don't have any of those plugins.
only these two are active for our users:
http://donncha.wordpress.com/flickr-widget/
http://www.fullimpact.net/ics-calendar.php

have been very conservative about introducing new plugins....

What's in mu-plugins?

doh!
the following are in there (a colleague put them in)

/mu-plugins/ldap_auth.php
/mu-plugins/ldap/ (with 3 sub-folders)
/mu-plugins/list-all.php

but if i go to:
/wp-admin/wpmu-admin.php?page=wpmu_ldap_admin.functions.php
LDAP is all turned off.

i removed the content if this folder
/mu-plugins/ldap/
and the site stopped rendering..

You can't just remove the ldap folder. You have to remove the ldap_auth.php file as well. It's borking right now because the ldap_auth.php file is looking for the ldap subfolder.

perfect!
MANY THANKS