[root@as ~]# yum update
Loading "protectbase" plugin
Setting up Update Process
Setting up repositories
Reading repository metadata in from local files
Excluding Packages from CentOS-4 - Base
Finished
377 packages excluded due to repository protections
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Package newt51.i386 0:0.51.6-5.el4.pyv set to be updated
---> Package python23.i386 0:2.3.5-10.el4.pyv set to be updated
--> Running transaction check
--> Processing Dependency: alternatives for package: python23
--> Processing Dependency: python = 2.3.4-14.4 for package: python-devel
--> Restarting Dependency Resolution with new changes.
--> Populating transaction set with selected packages. Please wait.
---> Package alternatives.noarch 0:0.2.0rc3-9 set to be updated
--> Running transaction check
--> Processing Dependency: python = 2.3.4-14.4 for package: python-devel
--> Finished Dependency Resolution
Error: Missing Dependency: python = 2.3.4-14.4 is needed by package python-devel