[R-SIG-Mac] CRAN and packages problems

[varin sacha]

Dear R-experts,

Can somebody tell me what is going on ?

Here is what I get :

download.file('https://stat.ethz.ch/CRAN/src/contrib/PACKAGES','PACKAGES')

essai de l'URL 'https://stat.ethz.ch/CRAN/src/contrib/PACKAGES'
Erreur dans download.file("https://stat.ethz.ch/CRAN/src/contrib/PACKAGES",  :
  impossible d'ouvrir l'URL 'https://stat.ethz.ch/CRAN/src/contrib/PACKAGES'
De plus : Message d'avis :
Dans download.file("https://stat.ethz.ch/CRAN/src/contrib/PACKAGES",  :
  URL 'https://stat.ethz.ch/CRAN/src/contrib/PACKAGES': statut 'Peer certificate cannot be authenticated with given CA certificates'