a brief announcement of updates to computer modern appeared in the tugboat article
"TeX Live 2009 news".
an earlier article, "Reshaping Euler: A collaboration with Hermann Zapf"
describes the work done on the euler fonts, a project intended as a 70th
birthday present for don knuth; it was during that work that computer modern
was also tuned up, although that isn't mentioned there.
don made some comments regarding specific changes to computer modern at the 1995
tug meeting in st. petersburg, florida. these are part of the q&a session,
transcribed and published in tugboat 17:1, pp.7-22 (the relevant comments are on pp.17-18), and republished
in digital typography, pp.573-600, with the relevant text on p.592. some
"older" tex users may remember the brouhaha about the shape of
there may be something more extensive; if so, i will add the information here.