GNU CLISP 2.31 was released on 2003-09-01
and was duly announced on clisp-announce
and comp.lang.lisp.
Sorry about the belated announcement here.
You can find the NEWS at the top of
http://cvs.sourceforge.net/viewcvs.py/\*checkout*/clisp/clisp/src/NEWS?rev=1.103