With Joomla 1.7 released, a new version of Freestyle Support is needed. We are still a couple of days away from having properly tested this, but for the moment, if you would like to use Joomla 1.7 with Freestyle Support, we have a fix should hopefully fix the problems we have found so far.
You can download the fix here
This file needs to be uploaded to your joomla install under components/com_fss/ overwriting the existing helper.php file
Freestyle Joomla Admin Team