• Freshly new installed CentOS 5.5
• SOGo 1.2.2 and / or nighlty

issuing command :

yum install sogo

gives the following results

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile

• addons: mirror.ovh.net
• base: mirror.ovh.net
• extras: mirror.ovh.net
• updates: mirror.ovh.net
  Setting up Install Process
  Resolving Dependencies
  --> Running transaction check
  ---> Package sogo.i386 0:1.2_20100528-1.el5 set to be updated
  --> Processing Dependency: memcached for package: sogo
  --> Running transaction check
  ---> Package memcached.i386 0:1.4.2-1.el5 set to be updated
  --> Processing Dependency: libevent-1.1a.so.1 for package: memcached
  --> Finished Dependency Resolution
  memcached-1.4.2-1.el5.i386 from sogo-nightly-rhel5 has depsolving problems
  --> Missing Dependency: libevent-1.1a.so.1 is needed by package memcached-1.4.2-1.el5.i386 (sogo-nightly-rhel5)
  Error: Missing Dependency: libevent-1.1a.so.1 is needed by package memcached-1.4.2-1.el5.i386 (sogo-nightly-rhel5)
  You could try using --skip-broken to work around the problem
  You could try running: package-cleanup --problems
  package-cleanup --dupes
  rpm -Va --nofiles --nodigest
  The program package-cleanup is found in the yum-utils package.
  [root@ssandbox sogo]#