CentOS 5.1 - I have already executed 'yum clean all' but the error persists. What could be the problem?

$ yum groupinstall "GNOME Desktop Environment" Loading "installonlyn" plugin Setting up Group Process Setting up repositories Setting up repositories Reading repository metadata in from local files Package gnome-panel - 2.16.1-6.el5.i386 already installed and latest version Package metacity - 2.16.0-8.el5.i386 already installed and latest version Package at-spi - 1.7.11-2.fc6.i386 already installed and latest version Package gtk2-engines - 2.8.0-3.el5.i386 already installed and latest version Package gnome-screensaver - 2.16.1-5.el5_1.1.i386 already installed and latest version Resolving Dependencies

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--> Processing Dependency: foomatic for package: system-config-printer-libs --> Processing Dependency: lockdev for package: gphoto2 --> Processing Dependency: libgaim.so.0 for package: nautilus-sendto --> Processing Dependency: libpq.so.4 for package: apr-util --> Processing Dependency: PyXML for package: system-config-printer-libs --> Restarting Dependency Resolution with new changes. --> Populating transaction set with selected packages. Please wait. ---> Package foomatic.i386 0:3.0.2-38.1.el5 set to be updated ---> Package PyXML.i386 0:0.8.4-4 set to be updated ---> Package lockdev.i386 0:1.0.1-10 set to be updated ---> Package postgresql-libs.i386 0:8.1.11-1.el5_1.1 set to be updated --> Running transaction check --> Processing Dependency: libgaim.so.0 for package: nautilus-sendto --> Finished Dependency Resolution Error: Missing Dependency: libgaim.so.0 is needed by package nautilus-sendto