Yum conflicts and packaging question

[JD]

Hi All,
In order to avoid conflicts like

Transaction Check Error:
   file /usr/share/mythtv/themes/MythCenter-wide/recordings-ui.xml from 
install of mythtv-themes-0.24-272.fc14.i686 conflicts with file from 
package mythtv-base-themes-0.24-7.fc14.i686

Should not the new package have a directive in it
to obsolete the package it is in conflict with;
since the new package comes from the self same
repo as the package it is conflicting with?

The mythTV packages mentioned above come from atrpms.