When install memcached on FC8 and libevent.1.3e, there is an error loading libevent.1.3e.so.
Here is how to overcome this error:

Download memcached and libevent
Install libevent (1.3e)
Unzip memcached
Instead of ./configure, use this:
DFLAGS=’-Wl,–rpath /usr/local/lib’ ./configure –prefix=/usr/local
make
make install
now you can run without error:
memcached -d -u root