Moving to Fedora Core 5 requires to rebuild all arch specific Fedora Extras packages. Accordingly build dates, this does not seem to have happened for this package. Please rebuild the package as soon as possible. When you did this already, ignore and close this bugreport please. For more information see http://www.fedoraproject.org/wiki/Extras/FC5Status.
Thank you very much for the request. Submitted request for FC-5 branch creation of libtabe. A FC-5 branch is needed in advance to the such package rebuild.
Update: As xcin are not included in fedora, libtabe will be excluded from fedora extras.