Fehlermeldung
Warning: igbinary_unserialize_header: unsupported version: "O:8:"..., should begin with a binary version header of "\x00\x00\x00\x01" or "\x00\x00\x00\x02" in _dmemcache_get_pieces() (line 340 of /data/www/portal/sites/all/modules/memcache/dmemcache.inc).