[Yum] Weird yum obsoletes scenario

[Michael A. Peters]

Here's an illustration of my problem:

[root at devel ~]# rpm --test -ih /home/buildmaster/yum/fedora/3/i386/ 
RPMS.bleed/gi
flib-4.1.3-0.0.yjl.1.i386.rpm
########################################### [100%]
        file /usr/lib/libgif.so.4.1.3 from install of  
giflib-4.1.3-0.0.yjl.1 con
flicts with file from package libungif-4.1.3-1
        file /usr/lib/libungif.so.4.1.3 from install of  
giflib-4.1.3-0.0.yjl.1 c
onflicts with file from package libungif-4.1.3-1
[root at devel ~]# yum localinstall /home/buildmaster/yum/fedora/3/i386/ 
RPMS.bleed/giflib-4.1.3-0.0.yjl.1.i386.rpm
Setting up Local Package Process
Examining /home/buildmaster/yum/fedora/3/i386/RPMS.bleed/ 
giflib-4.1.3-0.0.yjl.1.i386.rpm: giflib - 4.1.3-0.0.yjl.1.i386
Marking /home/buildmaster/yum/fedora/3/i386/RPMS.bleed/ 
giflib-4.1.3-0.0.yjl.1.i386.rpm to be installed
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Package giflib.i386 0:4.1.3-0.0.yjl.1 set to be installed
--> Running transaction check

Dependencies Resolved
Transaction Listing:
  Install: giflib.i386 0:4.1.3-0.0.yjl.1
Is this ok [y/N]: y
Downloading Packages:
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing: giflib 100 % done 1/1

Installed: giflib.i386 0:4.1.3-0.0.yjl.1
Complete!
[root at devel ~]# rpm -q libungif
libungif-4.1.3-1
[root at devel ~]# rpm -qf /usr/lib/libgif.so.4.1.3
libungif-4.1.3-1
giflib-4.1.3-0.0.yjl.1
[root at devel ~]#

-=-
If as you can see they conflict with rpm --test -ih - then why does the  
rpm database retain libungif when yum installs giflib?

-=-
When I use just rpm and not yum, ih reports conflict, Uh installs  
giflib and removes libungif. yum won't update though if you just  
specify update giflib, since giflib isn't installed. The only way yum  
does it right is if "yum update" is run with no arguements, and yum  
discovers on its own (from the headers) that giflib obsoletes libungif.