PHP 5.4 / Fatal error

[Marc-pi]

when running PHP 5.4.6, a fatal error is generated.
(ok with 5.3.16)

Fatal error: Uncaught exception 'DomainException' with message 'Storage "Memcached" is not supported.' in /www/pi-engine/lib/Pi/Application/Persist.php:47 Stack trace: #0 /www/pi-engine/lib/Pi.php(342): Pi\Application\Persist->__construct(Array) #1 /www/pi-engine/lib/Pi.php(221): Pi::persist(Array) #2 /www/pi-engine/lib/Pi.php(657): Pi::init() #3 /www/pi-engine/www/boot.php(27): include('/home.99/mdxpr...') #4 /www/pi-engine/www/index.php(30): include('/home.99/mdxpr...') #5 {main} thrown in /www/pi-engine/lib/Pi/Application/Persist.php on line 47

[Marc-pi]

hum, i tested with a fresh install again, its runs again
sorry.