[Fedora TeX Live] Unable to update f17->f18

[Neal Becker]

sudo yum --releasever=18 --disableplugin=presto distro-sync
[...]

Many errors, such as:

Error: Package:
1:texlive-collection-documentation-portuguese-0.svn13822-10.20121205_r28449.fc18.noarch
(updates)
           Requires: texlive-beamer-tut-pt-doc
           Available: 1:texlive-beamer-tut-pt-doc-0.svn15878-8.fc18.noarch
(fedora)
               texlive-beamer-tut-pt-doc = 1:0.svn15878-8.fc18
           Available: 1:texlive-beamer-tut-pt-doc-0.svn15878-10.fc18.noarch
(updates)
               texlive-beamer-tut-pt-doc = 1:0.svn15878-10.fc18
Error: Package:
1:texlive-collection-documentation-english-0.svn27471-10.20121205_r28449.fc18.noarch
(updates)
           Requires: texlive-tex-font-errors-cheatsheet-doc
           Available:
1:texlive-tex-font-errors-cheatsheet-doc-0.1.svn18314-8.fc18.noarch (fedora)
               texlive-tex-font-errors-cheatsheet-doc =
1:0.1.svn18314-8.fc18
           Available:
1:texlive-tex-font-errors-cheatsheet-doc-0.1.svn18314-10.fc18.noarch
(updates)
               texlive-tex-font-errors-cheatsheet-doc =
1:0.1.svn18314-10.fc18
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