$Configuration['Garden']['Installed'] = TRUE;and if so, try changing it to FALSE?
/cache/*where in cache it creates Smarty/cache, Smarty/compile, HtmlPurifier/HTML, HtmlPurifier/URI (last two for the HtmlPurifier plugin) ... and so on. If it's not at some point making these directories, I'm sure something's configured incorrectly or there could be a PHP 5.2.5 bug. Run ls -Al (that's Al as in the name) and see what it reports next to cache, conf, and uploads ... compare that to User/Group in a php_info(); call or something like that.
/conf/config.php
/uploads/*
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