Hello,
i'm a little diffused by organise my CB Menu.
The "Community Builder » userprofile" Menu entry link to the own profile with a link to this SEF URL:

example.com/my-menu/cb-profile

The Avatar on the page next to the login link to this own profile with a link to this SEF URL:

example.com/my-menu/cb-profile/userprofile

And the SEF URLs for all users profiles is so:

example.com/my-menu/cb-profile/userprofile/username

Exactly have a user three SEF URLs to the own profile.
My problem is yet the SEF URL part "/cb-profile". There are extended the SEF URL unnecessary.

I wish, that the users own SEF URL is the same to all other users profile SEF URLs without this part "/cb-profile".

example.com/my-menu/userprofile/username

And please all other SEF URLs don't change.

hm... OK.
Also, the URL 2 is unnecessary. Then they can it be the standard User Profile Url with the name at the end in the URL.

The URL 1 is the standard problem on many CMS Tools. All required a self /home folder. That it's the problem. But, there is absolute unnecessary. For the CMS Admins it is difficult to erase this URL part.
It's beside not so harmfull, when the startsite URL to the website is:

www.example.com/home

but not

www.example.com

By less CMS Tools it's the trick to delete the menu adress entry direct in the database and all is fine.

For the login page URL you can generate a separate URL and redirect to this by system logout or pages with missing user permissions.

The thing is not only a SEO URL, the thing is a meaningfull SEO URL.

EDIT:
oops. sorry, there was not realy correct.

The problem is occasionally the joomla menu URL part.
With the /home URL part for a extension i can live with it, or rename it.

*puh* i have found a nearly absolutely solution!

1.) It's required the Joomla "Guest" User Group / Viewing Access Level / Permission.

Tutorial for create a "Guest" Group and Level in Joomla:

docs.joomla.org/J2.5:Access_Control_List_Tutorial
scroll to: "Allowing Guest-Only Access to Menu Items and Modules"

2.) Create a Menu-entry with "Community Builder » login" and set Parent Item -> "Menu Item Root" and Status -> "Puplished" and Access -> "Guest".
It will display ONLY for non-logged-in Users. If user logged in, the menu is hidden.
(Warning: don't test it in the same browser if you logged in before, or delete all cookies.)

3.) Create a Menu-entry with "Community Builder » userprofile"

User Profile (mandatory!)
This is the main menu item of Community Builder. Please create only one of them and make sure that this menu item is of public access and published.

and set Parent Item -> "Menu Item Root" and Status -> "Puplished" and Access -> "Registered".
By this menu-entry you can rename the URL-part in the field "Alias" on top of the page.
This menu-entry you can set it as parent for all other CB menu-entrys (Lists, Logged out, Moderate, ...).

4.) Important! else error page after log in:
Go to:
Joomla Module: "Community Builder Login module" (or create a new)
- Tab: Login Options
-- Field: Login Redirection URL
--- insert: /cb-profile
! Please consider the "Alias rename" in the menu-entry.

---

With this tutorial you have following solution:

1. A Menu-entry for Log In that is displayed only when user is NOT logged in.

2. A Menu-entry for CB Pages that is displayed only when user is NOT logged in.

3. When user logged in, it will be redirect to your profile page

4. The URLs for CB:

after logged in:
example.com/cb-profile

other cb pages (list, moderate, logged out, ...):
example.com/cb-profile/cb-other

other user pages:
example.com/cb-profile/userprofile/username

*puh* final!