Description of problem:
# yum upgrade
...
Transaction Check Error:
  file /usr/lib/debug/usr/lib64/notification-daemon-1.0/engines/libslider.so.debug from install of notification-daemon-debuginfo-0.5.0-1.el6.x86_64 conflicts with file from package notification-daemon-engine-slider-debuginfo-0.2.0-2.el6.x86_64

Version-Release number of selected component (if applicable):
# rpm -q notification-daemon-engine-slider
package notification-daemon-engine-slider is not installed
# rpm -q notification-daemon-engine-slider-debuginfo
notification-daemon-engine-slider-debuginfo-0.2.0-2.el6.x86_64
# rpm -q notification-daemon-debuginfo
notification-daemon-debuginfo-0.4.1-0.20090923.4.el6.x86_64
# rpm -q notification-daemon
notification-daemon-0.5.0-1.el6.x86_64

How reproducible:
always

Steps to Reproduce:
1. install old notification-daemon-engine-slider + debuginfo package
2. do yum upgrade
  
Actual results:
notification-daemon-engine-slider is correctly replaced (obsoleted) by notification-daemon, but associated debuginfo packages are not. 

Expected results:
both base package and debuginfo package are upgraded at the same time.