Selecting files does not work on Galaxy Ace and Android 2.3.6

Hi all, one of my users reports being unable to load images from his android mobile, from my logs it appears he uses Android 2.3.6:

Mozilla/5.0 (Linux; U; Android 2.3.6; fr-fr; GT-S5839i Build/GINGERBREAD) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1 )

I am not sure if I should add some specific configuration to make it degrade gracefuly for mobiles ? thank you