The HTML link 'Customizing package compilation' in 'Writing R Extensions' is broken. See the offending link near here: http://cran.r-project.org/doc/manuals/R-exts.html#Submitting-a-package-to-CRAN In R-exts.texi, it looks like a five-argument @xref was intended. Oddly, the PDF link works anyway. This fixes the HTML link for me; doesn't break the PDF link: Index: doc/manual/R-exts.texi ==================================================================--- doc/manual/R-exts.texi (revision 55161) +++ doc/manual/R-exts.texi (working copy) @@ -2104,7 +2104,7 @@ Collection. If @R{} was not configured accordingly, one can achieve this @emph{via} personal @file{Makevars} files. @ifset UseExternalXrefs - at xref{Customizing package compilation, + at xref{Customizing package compilation, , Customizing package compilation, R-admin, R Installation and Administration}, @end ifset -- Matthew S Shotwell Assistant Professor School of Medicine Department of Biostatistics Vanderbilt University