The error your board is currently displaying is:
Code: Select all
Warning: require(./config.php) [function.require]: failed to open stream: Permission denied in /home/brushwood/thegardenforums.org/common.php on line 127
Fatal error: require() [function.require]: Failed opening required './config.php' (include_path='.:/usr/local/php5/lib/php:/usr/local/lib/php') in /home/brushwood/thegardenforums.org/common.php on line 127
This has nothing to do with "root paths". It simply means your config.php has the wrong CHMOD permissions set.
Use your FTP program to change them to 644 as described in this article:
Knowledge Base - phpBB3 Chmod Permissions
(If this was a host install, and they did the upgrade, then they should have set the permissions correctly too. I'd be complaining to them that THEY broke it.)