Declaration of Piwik_Event_Notification::increaseNotificationCount() should be compatible with that of Event_Notification::increaseNotificationCount() 
in '/home/onnojan/onno.net/piwik/core/PluginsManager.php' at the line 509

#0  Piwik_ErrorHandler(2048, Declaration of Piwik_Event_Notification::increaseNotificationCount() should be compatible with that of Event_Notification::increaseNotificationCount(), /home/onnojan/onno.net/piwik/core/PluginsManager.php, 509, Array ([GLOBALS] => Array ( *RECURSION*,[_POST] => Array (),[_GET] => Array (),[_COOKIE] => Array (),[_FILES] => Array (),[piwik_minimumPHPVersion] => 5.1.3,[piwik_currentPHPVersion] => 5.2.12,[piwik_zend_compatibility_mode] => ,[_SERVER] => Array ([PATH] => /bin:/usr/bin:/sbin:/usr/sbin,[RAILS_ENV] => production,[FCGI_ROLE] => RESPONDER,[UNIQUE_ID] => S5gchkWjgbQAAF1iQUoAAAAI,[SCRIPT_URL] => /piwik/,[SCRIPT_URI] => http://www.onno.net/piwik/,[dsid] => 9866217,[ds_id_9866217] => ,[DH_USER] => onnojan,[HTTP_X_CC_ID] => ccc02-01,[HTTP_HOST] => www.onno.net,[HTTP_USER_AGENT] => CCBot/1.0 (+http://www.commoncrawl.org/bot.html),[HTTP_ACCEPT] => text/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5,[HTTP_ACCEPT_LANGUAGE] => en-us,en;q=0.5,[HTTP_ACCEPT_ENCODING] => gzip,[HTTP_ACCEPT_CHARSET] => ISO-8859-1,utf-8;q=0.7,*;q=0.7,[HTTP_CONNECTION] => close,[HTTP_CACHE_CONTROL] => no-cache,[HTTP_PRAGMA] => no-cache,[SERVER_SIGNATURE] => ,[SERVER_SOFTWARE] => Apache,[SERVER_NAME] => www.onno.net,[SERVER_ADDR] => 69.163.129.199,[SERVER_PORT] => 80,[REMOTE_ADDR] => 38.107.191.82,[DOCUMENT_ROOT] => /home/onnojan/onno.net,[SERVER_ADMIN] => webmaster@onno.net,[SCRIPT_FILENAME] => /home/onnojan/onno.net/piwik/index.php,[REMOTE_PORT] => 46541,[GATEWAY_INTERFACE] => CGI/1.1,[SERVER_PROTOCOL] => HTTP/1.1,[REQUEST_METHOD] => GET,[QUERY_STRING] => ,[REQUEST_URI] => /piwik/,[SCRIPT_NAME] => /piwik/index.php,[PHP_SELF] => /piwik/index.php,[REQUEST_TIME] => 1268259974,[argv] => Array (),[argc] => 0),[_SESSION] => Array (),[_Event_Dispatcher] => Array ([NotificationClass] => Event_Notification))) called at [/home/onnojan/onno.net/piwik/core/PluginsManager.php:509]
#1  require_once(/home/onnojan/onno.net/piwik/core/PluginsManager.php) called at [/home/onnojan/onno.net/piwik/core/FrontController.php:24]
#2  require_once(/home/onnojan/onno.net/piwik/core/FrontController.php) called at [/home/onnojan/onno.net/piwik/index.php:43]