Found the following significant warnings:
  Rd warning: /home/hornik/tmp/scratch/RtmpIAnIDL/R.INSTALL30bf1d74bf05/ggthemes/man/stat_fivenumber.Rd:73: file link ‘stat_boxplot’ in package ‘ggplot2’ does not exist and so has been treated as a topic
  Rd warning: /home/hornik/tmp/scratch/RtmpIAnIDL/R.INSTALL30bf1d74bf05/ggthemes/man/theme_foundation.Rd:19: file link ‘theme_gray’ in package ‘ggplot2’ does not exist and so has been treated as a topic
  Rd warning: /home/hornik/tmp/scratch/RtmpIAnIDL/R.INSTALL30bf1d74bf05/ggthemes/man/theme_foundation.Rd:19: file link ‘theme_bw’ in package ‘ggplot2’ does not exist and so has been treated as a topic
  Rd warning: /home/hornik/tmp/scratch/RtmpIAnIDL/R.INSTALL30bf1d74bf05/ggthemes/man/theme_foundation.Rd:23: file link ‘theme_gray’ in package ‘ggplot2’ does not exist and so has been treated as a topic
  Rd warning: /home/hornik/tmp/scratch/RtmpIAnIDL/R.INSTALL30bf1d74bf05/ggthemes/man/theme_igray.Rd:20: file link ‘theme_gray’ in package ‘ggplot2’ does not exist and so has been treated as a topic
  Rd warning: /home/hornik/tmp/scratch/RtmpIAnIDL/R.INSTALL30bf1d74bf05/ggthemes/man/theme_igray.Rd:22: file link ‘theme_bw’ in package ‘ggplot2’ does not exist and so has been treated as a topic
  Rd warning: /home/hornik/tmp/scratch/RtmpIAnIDL/R.INSTALL30bf1d74bf05/ggthemes/man/theme_igray.Rd:25: file link ‘theme_gray’ in package ‘ggplot2’ does not exist and so has been treated as a topic
  Rd warning: /home/hornik/tmp/scratch/RtmpIAnIDL/R.INSTALL30bf1d74bf05/ggthemes/man/theme_igray.Rd:38: file link ‘theme_gray’ in package ‘ggplot2’ does not exist and so has been treated as a topic
  Rd warning: /home/hornik/tmp/scratch/RtmpIAnIDL/R.INSTALL30bf1d74bf05/ggthemes/man/theme_igray.Rd:39: file link ‘theme_bw’ in package ‘ggplot2’ does not exist and so has been treated as a topic
  Rd warning: /home/hornik/tmp/scratch/RtmpIAnIDL/R.INSTALL30bf1d74bf05/ggthemes/man/theme_solarized.Rd:28: file link ‘theme_bw’ in package ‘ggplot2’ does not exist and so has been treated as a topic
  Rd warning: /home/hornik/tmp/scratch/RtmpIAnIDL/R.INSTALL30bf1d74bf05/ggthemes/man/theme_solarized.Rd:29: file link ‘theme_gray’ in package ‘ggplot2’ does not exist and so has been treated as a topic
See ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/ggthemes.Rcheck/00install.out’ for details.