[samuelp@localhost Desktop]$ sudo yum install libwnck
Setting up Install Process
Parsing package install arguments
Package libwnck - 2.20.1-3.fc8.i386 is already installed.
Nothing to do
[samuelp@localhost Desktop]$ sudo rpm -i avant-window-navigator-0.1.1-25.20070525svn.fc6.i386.rpm 
error: Failed dependencies:
        libwnck-1.so.18 is needed by avant-window-navigator-0.1.1-25.20070525svn.fc6.i386
[samuelp@localhost Desktop]$