I was trying to use Rsync on a Solaris machine and received the following error message:
ld.so.1: /usr/local/bin/rsync: fatal: libpopt.so.0: open failed: No such file or directory
I discovered from http://www.sunmanagers.org/pipermail/sunmanagers/2002-May/014178.html that it is an evil LD_LIBRARY issue which can be overcome with the following (as root):
crle -l /usr/lib:/usr/local/libcrle -u