After my update on my remote server i get this error.

SQLSTATE[1203 User xxxxxxxxxx already has more than 'max_user_connections' active connections

Backtrace:
#0 /piwik/libs/Zend/Db/Adapter/Abstract.php(228): Zend_Db_Adapter_Pdo_Abstract->_connect()
#1 /piwik/core/Piwik.php(1213): Zend_Db_Adapter_Abstract->getConnection()
#2 /piwik/core/FrontController.php(206): Piwik::createDatabaseObject()
#3 /piwik/index.php(52): Piwik_FrontController->init()
#4 {main}

This is surprising for me because i don't get any problem on my local server.

On the remote server all the design from the main dashboard is also broken.
I deleted all the widget and then replace them again. Both problems of connection to the db and of the design were solve but after a logout/login the problem was there again.