Cannot send headers; headers already sent in /home/hoomet/public_html/application/libraries/Zend/Registry.php, line 206#0 /home/hoomet/public_html/application/libraries/Zend/Controller/Response/Abstract.php(148): Zend_Controller_Response_Abstract->canSendHeaders(true)
#1 /home/hoomet/public_html/application/libraries/Zend/Controller/Action/Helper/Redirector.php(226): Zend_Controller_Response_Abstract->setRedirect('/install/', 302)
#2 /home/hoomet/public_html/application/libraries/Zend/Controller/Action/Helper/Redirector.php(321): Zend_Controller_Action_Helper_Redirector->_redirect('/install/')
#3 /home/hoomet/public_html/application/libraries/Zend/Controller/Action/Helper/Redirector.php(420): Zend_Controller_Action_Helper_Redirector->setGotoRoute(Array, 'default', true, true)
#4 /home/hoomet/public_html/install/controllers/ErrorController.php(25): Zend_Controller_Action_Helper_Redirector->gotoRoute(Array, 'default', true)
#5 /home/hoomet/public_html/application/libraries/Zend/Controller/Action.php(133): ErrorController->init()
#6 /home/hoomet/public_html/application/libraries/Zend/Controller/Dispatcher/Standard.php(281): Zend_Controller_Action->__construct(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http), Array)
#7 /home/hoomet/public_html/application/libraries/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#8 /home/hoomet/public_html/application/libraries/Zend/Application/Bootstrap/Bootstrap.php(105): Zend_Controller_Front->dispatch()
#9 /home/hoomet/public_html/application/libraries/Zend/Application.php(384): Zend_Application_Bootstrap_Bootstrap->run()
#10 /home/hoomet/public_html/install/index.php(92): Zend_Application->run()
#11 {main}

For "cache_dir is not writable", set full permissions on temporary/cache