[R-sig-Debian] r-base installation fails on Ubuntu 14.04

[Barnet Wagman]

One of the dependency problems I'm having is:

gfortran-4.8 : Depends: gcc-4.8-base (= 4.8.2-19ubuntu1) but 
4.8.4-2ubuntu1~14.04.1 is installed.

I'm not sure how to  interpret this.  Does this mean that the gfortran 
installed is too recent?  If so, does R really require an older version 
of gfortran, or is this related to the way the r-base-core package is 
specified?