I went to install Thunderbird from the Fedora repo, and outputed the following:

yum install thunderbird
rawhide                   100% |=========================| 2.4 kB    00:00    
Setting up Install Process
Parsing package install arguments
Resolving Dependencies
--> Running transaction check
---> Package thunderbird.i386 0:2.0.0.12-4.fc9 set to be updated
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================
 Package                 Arch       Version          Repository        Size
=============================================================================
Installing:
 thunderbird             i386       2.0.0.12-4.fc9   rawhide            23 M

Transaction Summary
=============================================================================
Install      1 Package(s)        
Update       0 Package(s)        
Remove       0 Package(s)        

Total download size: 23 M
Is this ok [y/N]:
 
If package x is not installed, shouldn't the:
---> Package thunderbird.i386 0:2.0.0.12-4.fc9 set to be updated
be
---> Package thunderbird.i386 0:2.0.0.12-4.fc9 set to be installed.

I might be knitpicking, but be good to get it cleared up.

--
David Hunter