So for your php.ini file
magic_quotes_gpc = Off
session.save_path = "/tmp"
didn't work and for your .htaccess file method this didn't work:
php_flag magic_quotes_gpc Off
In this case the hoster will have to do it for you.
The hoster would not do this due , he means "security risk" and we have not speak detailed because he is on holiday , have we chance to use some codes like overrides until he comes , and ı have give a link on mine first post , there the poster means do a little hack on core can this method have security holes or another critical things.