The i386-linux.tgz tarball is embedded in the normal package tarball. The only reason it's there its because the path length of the site_
perl stuff exceeds the 100 character limit of the built in 'star' (serial tar) command of FREESCO. This is why its now extracted in a 2-step approach. The normal package tarball is extracted, and then in the postinstall the i386-linux.tgz is extracted after making the /usr/local/lib/perl5/site_
perl/5.6.1 directory the active directory.
Note how the install script fails at the 'cd' command:
cd: can't cd to /usr/local/lib/perl5/site_perl/5.6.1
but that means the full package tarball didn't extract correctly to begin with!

How did you try to install? Via the package menu or from the commandline using the pkg command?