postfix update strangeness?

[Tom Horsley]

This is probably one of those things I don't really want to
know the answer to, but it looked strange so I though I'd ask:

Just updated a system, and rather than getting a new version
of postfix merely because it was updated, it seemed to go through
some convoluted reasoning process to give me a new version:

Resolving Dependencies
--> Running transaction check
...
---> Package postfix-perl-scripts.i386 2:2.5.6-1.fc10 set to be updated
--> Processing Dependency: postfix = 2:2.5.6-1.fc10 for package: postfix-perl-scripts
--> Running transaction check
---> Package postfix.i386 2:2.5.6-1.fc10 set to be updated
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package                   Arch        Version               Repository    Size
================================================================================
Installing:
 postfix-perl-scripts      i386        2:2.5.6-1.fc10        updates       60 k
     replacing  postfix.i386 2:2.5.5-1.fc10

Updating:
...
Updating for dependencies:
 postfix                   i386        2:2.5.6-1.fc10        updates      3.8 M

Is postfix-perl-scripts being split out of what used to be a combined
package or something, and this is how it looks when I update?