Automatic alias not created

Issue Summary

Originally posted this issue over in the path auto issue queue http://drupal.org/node/1408304, but am closing that thread due to lack of response.

I'm using content profile to extend some user profiles for our site. We have a role for a manager who has permission to create user profiles.
I've set up pathauto to create path aliases for the users content profiles.

If i create a new user ( and content profile) as user 1 , the newly created content gets the correct URL alias.
If I perform the same action masquerading in the managera role, the URL alias is not generated - in fact I can see that the 'Generate automatic URL alias' checkbox is not ticked on the node edit form at all.

I've given the role all of the necessary permissions. I'm not sure what's up? Has anyone got any advice?