I've set a user to be a Role Administrator, but the Manage Roles tab does not appear for a user when a person in the Role Administrator manage that user.

From the documentation (http://www.mojoportal.com/rolesandpermissions.aspx) I would think I could do this:

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Role Administrators

Users in this role can create and delete roles (except non deletable system roles) and can add/remove users from roles except the Administrators role.

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To assign the user to a role, I have to follow this path:

Administration -> Role Administration -> View/Edit Members --> Add existing user to role --> Search for user in the pages (why no search field here? For a large list I have to hunt and peck to find the right user)  ->  Select

This is a long route to take when I can search for the user in the member list. The path I want is:

Member List -> Search for user -> Manage -> Role Membership -> Select role from drop down -> Add User to This Role

I have the exact same issue (version 2.3.6.7) and logging out and logging in again didn't help with the issue.

It seems that only full administrators have access to the Role Membership tab when managing a user. Going the long route to edit a user's role as John pointed out works for adding a role to a user, but it doesn't allow the easy access to view all roles assigned to a user. It would be much nicer to go to the Member List > find the user > Manage and the Role Administrator user group had access to view the much friendlier Role Membership tab.