Just for fun, I tried installing the new perl 5.8.0 release on Mac OS 10.1.5. The perl installation went fine (all the tests passed that should), however, when I tried to reinstall ifeffit, problems ensued. The installation attempt (the very tip) is pasted below. Is this a sign of problems to come? I don't know perl well enough to know where these modules came from. For the moment my resolution is to install perl 5.6.1 (a slight upgrade from the default 5.6.0 included with the OS) [etld1220:ifeffit_1.0b/wrappers/perl] paulfons% perl -v This is perl, v5.8.0 built for darwin Copyright 1987-2002, Larry Wall Perl may be copied only under the terms of either the Artistic License or the GNU General Public License, which may be found in the Perl 5 source kit. Complete documentation for Perl, including FAQ lists, should be found on this system using `man perl' or `perldoc perl'. If you have access to the Internet, point your browser at http://www.perl.com/, the Perl Home Page. [etld1220:ifeffit_1.0b/wrappers/perl] paulfons% perl Makefile.PL Checking if your kit is complete... Looks good Warning: -L../../src/lib changed to -L/Users/paulfons/Ports/ifeffit_1.0b/wrappers/perl/../../src/lib Configuring athena for installation with ifeffit Checking dependencies ... dyld: perl Undefined symbols: _Perl_safefree _Perl_safemalloc _Perl_saferealloc _Perl_sv_2pv _perl_call_method _perl_call_sv _perl_get_cv _perl_get_hv _perl_get_sv