Syncoid assumes a bourne style shell on remote hosts. Using (t)csh (the default for root under FreeBSD)
will cause syncoid to fail cryptically due to 2>&1 output redirects.

To use syncoid successfully with FreeBSD targets, you must use the chsh command to change the root shell:
    root@bsd:~# chsh -s /bin/sh

FreeBSD users will also need to change the Perl shebangs at the top of the executables from #!/usr/bin/perl 
to #!/usr/local/bin/perl in most cases.

Sorry folks, but if I set this with #!/usr/bin/env perl as suggested, then nothing works properly
from a typical cron environment on EITHER operating system, Linux or BSD.  I'm mostly using Linux
systems, so I get to set the shebang for my use and give you folks a FREEBSD readme rather than
the other way around. =)

If you don't want to have to change the shebangs, your other option is to drop a symlink on your system:

root@bsd:~# ln -s /usr/local/bin/perl /usr/bin/perl

After putting this symlink in place, ANY perl script shebanged for Linux will work on your system too.