[root@server ~]# yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * atomic: www6.atomicorp.com
Excluding Packages in global exclude list
Finished
Setting up Update Process
Resolving Dependencies
--> Running transaction check
[...]
---> Package mysql.i386 0:5.1.55-1.el5.art set to be updated
---> Package perl-Archive-Tar.noarch 1:1.39.1-2.el5.art set to be updated
---> Package perl-JSON-DWIW.x86_64 0:0.39-1.el5.rf set to be updated
---> Package php-pear.noarch 1:1.7.2-2.el5.art set to be updated
---> Package scponly.x86_64 0:4.8-5.el5.art set to be updated
---> Package spamassassin.x86_64 1:3.2.5-1.el5.art set to be updated
[...]
--> Running transaction check
!! --> Processing Dependency: clamav-server = 0.96.5-1.vm.el5 for package: clamav-server-sysv
---> Package mysql-libs.i386 0:5.1.55-1.el5.art set to be updated
---> Package mysql-libs.x86_64 0:5.1.55-1.el5.art set to be updated
---> Package mysqlclient15.x86_64 0:5.0.90-1.el5.art set to be updated
--> Processing Conflict: clamav-filesystem conflicts clamav > 0.96.5-1.vm.el5
--> Finished Dependency Resolution
clamav-filesystem-0.96.5-1.vm.el5.x86_64 from installed has depsolving problems
  --> clamav-filesystem conflicts with clamav
clamav-server-sysv-0.96.5-1.vm.el5.x86_64 from installed has depsolving problems
  --> Missing Dependency: clamav-server = 0.96.5-1.vm.el5 is needed by package clamav-server-sysv-0.96.5-1.vm.el5.x86_64 (installed)
Error: clamav-filesystem conflicts with clamav
Error: Missing Dependency: clamav-server = 0.96.5-1.vm.el5 is needed by package clamav-server-sysv-0.96.5-1.vm.el5.x86_64 (installed)
 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.