Editing the Zen theme, go into the img folder and rename logo.png to logo-orig.png:

Error Report
Error ID: 1024:Newscoop:3.6.0-RC3:smarty_internal_wrapper.php:57
Error String: function call 'clear_compiled_tpl' is unknown or deprecated.
Time: Mon, 21 Nov 2011 16:58:40 -0500
Backtrace:

{closure}() called at [:]
trigger_error() called at [/var/www/newscoop/library/smarty3/sysplugins/smarty_internal_wrapper.php:57]
Smarty_Internal_Wrapper::convert() called at [/var/www/newscoop/library/smarty3/Smarty.class.php:765]
Smarty::__call() called at [/var/www/newscoop/application/modules/admin/controllers/TemplateController.php:606]
CampTemplate::clear_compiled_tpl() called at [/var/www/newscoop/application/modules/admin/controllers/TemplateController.php:606]
Admin_TemplateController::clearCompiledTemplate() called at [/var/www/newscoop/application/modules/admin/controllers/TemplateController.php:336]
Admin_TemplateController::renameAction() called at [/usr/share/php/libzend-framework-php/Zend/Controller/Action.php:516]
Zend_Controller_Action::dispatch() called at [/usr/share/php/libzend-framework-php/Zend/Controller/Dispatcher/Standard.php:295]
Zend_Controller_Dispatcher_Standard::dispatch() called at [/usr/share/php/libzend-framework-php/Zend/Controller/Front.php:954]
Zend_Controller_Front::dispatch() called at [/usr/share/php/libzend-framework-php/Zend/Application/Bootstrap/Bootstrap.php:97]
Zend_Application_Bootstrap_Bootstrap::run() called at [/usr/share/php/libzend-framework-php/Zend/Application.php:366]
Zend_Application::run() called at [/var/www/newscoop/public/index.php:45]
require_once() called at [/var/www/newscoop/admin.php:4]