I've installed on my test page Joomla 1.7RC1.
When I got to the administration area on Community Builder components go, I get the following error
Fatal error: Call to a member function getCfg() on a non-object in /var/www/web0/html/jom1.6/administrator/components/com_comprofiler/plugin.foundation.php on line 3228
Wanted to encourage this only briefly, so that this can be fixed in the future.
Sorry for the bad English, this has been translated using Google.