$ gnumeric 
Shared object "libgthread-2.0.so.400" not found
$ sudo bash
Password:
# cd /usr/pkg/lib
# ln -s libgthread-2.0.so.0
libgthread-2.0.so.0        libgthread-2.0.so.0.400.7
# ln -s libgthread-2.0.so.0.400.7 libgthread-2.0.so.400
#

ok. Am I wrong, or is there something bust in libtool dealing with packages
with numbers in their name?

because after this symlink, and similar ones for:

libglib-2.0.so.400
libgobject-2.0.so.400
libgmodule-2.0.so.400

get created, some apps start working again. The common element appears to
be that the destination libs are part of glib2 which is tagged as
glib2-2.4.7 (not one of the xxxxxnbx series)

whadididowrong?

-George