Description of problem:
# dnf update colord
Setting up Update Process
Resolving Dependencies
--> Starting dependency resolution
--> Finished dependency resolution
Nothing to do

But:

# yum update colord
Loaded plugins: langpacks, presto, refresh-packagekit
Resolving Dependencies
--> Running transaction check
---> Package colord.x86_64 0:0.1.25-1.fc18 will be obsoleted
--> Processing Dependency: libcolord.so.1()(64bit) for package: colord-0.1.31-1.fc18.x86_64
--> Processing Dependency: libcolord.so.1()(64bit) for package: gtk3-3.6.4-1.fc18.x86_64
--> Processing Dependency: libcolord.so.1()(64bit) for package: gnome-settings-daemon-3.6.4-3.fc18.x86_64
--> Processing Dependency: libcolord.so.1()(64bit) for package: 1:control-center-3.6.3-1.fc18.x86_64
--> Processing Dependency: libcolord.so.1()(64bit) for package: colord-gtk-0.1.22-3.fc18.x86_64
--> Processing Dependency: libcolord.so.1()(64bit) for package: gnome-color-manager-3.6.1-1.fc18.x86_64
--> Processing Dependency: libcolord.so.1()(64bit) for package: simple-scan-3.6.0-1.fc18.x86_64
---> Package colord.x86_64 0:0.1.25-1.fc18 will be updated
---> Package colord.x86_64 0:0.1.31-1.fc18 will be obsoleting
---> Package shared-color-profiles.noarch 0:0.1.6-1.fc18 will be obsoleted
--> Running transaction check
---> Package colord-gtk.x86_64 0:0.1.22-3.fc18 will be updated
---> Package colord-gtk.x86_64 0:0.1.24-1.fc18 will be an update
---> Package colord-libs.x86_64 0:0.1.31-1.fc18 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package             Arch           Version               Repository       Size
================================================================================
Installing:
 colord              x86_64         0.1.31-1.fc18         updates         317 k
     replacing  colord.x86_64 0.1.25-1.fc18
     replacing  shared-color-profiles.noarch 0.1.6-1.fc18
Installing for dependencies:
 colord-libs         x86_64         0.1.31-1.fc18         updates         112 k
Updating for dependencies:
 colord-gtk          x86_64         0.1.24-1.fc18         updates          19 k

Transaction Summary
================================================================================
Install  1 Package  (+1 Dependent package)
Upgrade             ( 1 Dependent package)

Version-Release number of selected component (if applicable):
dnf-0.2.21-1.git050524e.fc18.noarch