RPM of new version 0.42 of libmemcached the library to communicate with memcached servers is available in remi repository for Fedora ≥ 6 and EL ≥ 4. It's also available in rawhide repository.
As always: yum --enablerepo=remi install libmemcached This library is required by the new memcached PECL extension (an alternative to memcache) in active development phase. As this new version breaks ABI (with previous 0.37), I don't plan any update in the fedora 13 repository. ABI is stable with previous 0.40 (in remi)... Lire libmemcached-0.42