I made a svn update to version 0.5. When I open piwik in the browser I get the following error message:
Invalid argument supplied for foreach()
in '<path>/piwik/core/Config.php' at the line 248
#0 Piwik_ErrorHandler(2, Invalid argument supplied for foreach(), <path>/piwik/core/Config.php, 248, Array ([allSections] => Array ())) called at [<path>/piwik/core/Config.php:248]
#1 Piwik_Config->cacheConfigArray() called at [<path>/piwik/core/Config.php:292]
#2 Piwik_Config->__get(Plugins) called at [<path>/piwik/core/FrontController.php:209]
#3 Piwik_FrontController->init() called at [<path>/piwik/index.php:99]
Any ideas?