Comment 4 for bug 722404

Same problem - cannot install php-mysql (from either remi and atomic repos) with Percona server:

[root@platform ~]# yum install php-mysql
Loaded plugins: fastestmirror, security
Loading mirror speeds from cached hostfile
 * atomic: www7.atomicorp.com
 * base: centos-mirror.rbc.ru
 * epel: mirror.xfes.ru
 * extras: centosq4.centos.org
 * updates: centos-mirror.rbc.ru
Reducing Polaz RPM repo for Centos 5 - x86_64 to included packages only
Finished
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package php-mysql.i386 0:5.3.17-10.el5.art set to be updated
--> Processing Dependency: libmysqlclient.so.18(libmysqlclient_18) for package: php-mysql
--> Processing Dependency: libmysqlclient.so.18(libmysqlclient_16) for package: php-mysql
--> Processing Dependency: libmysqlclient.so.18 for package: php-mysql
---> Package php-mysql.x86_64 0:5.3.17-10.el5.art set to be updated
--> Processing Dependency: libmysqlclient.so.18(libmysqlclient_18)(64bit) for package: php-mysql
--> Processing Dependency: libmysqlclient.so.18(libmysqlclient_16)(64bit) for package: php-mysql
--> Running transaction check
---> Package mysql-libs.i386 0:5.5.27-11.el5.art set to be updated
---> Package mysql-libs.x86_64 0:5.5.27-11.el5.art set to be updated
--> Finished Dependency Resolution

.....

Transaction Check Error:
  file /etc/my.cnf from install of mysql-libs-5.5.27-11.el5.art.x86_64 conflicts with file from package Percona-Server-server-55-5.5.27-rel28.1.296.rhel5.x86_64
  file /etc/my.cnf from install of mysql-libs-5.5.27-11.el5.art.i386 conflicts with file from package Percona-Server-server-55-5.5.27-rel28.1.296.rhel5.x86_64

Error Summary
-------------

[root@platform ~]# rpm -qa |grep -i percona
Percona-Server-client-55-5.5.27-rel28.1.296.rhel5
Percona-Server-shared-compat-5.5.27-rel28.1.296.rhel5
percona-release-0.0-1
Percona-Server-devel-55-5.5.27-rel28.1.296.rhel5
Percona-Server-shared-55-5.5.27-rel28.1.296.rhel5
Percona-Server-server-55-5.5.27-rel28.1.296.rhel5