/usr/ports/www/graphics/png install error

[Kris Yates]

I am upgrading from png port:
png-1.2.5                           <   needs updating (port has 1.2.5_2)

to png port 1.2.5_2.

"make" seems fine, the following error occurs on the port "make install":

cc -fpic -DPIC -O -pipe  -I. -DPNG_USE_PNGGCCRD  -c pnggccrd.c -o 
pnggccrd.So
building shared library libpng.so.5
gzip -cn libpng.3 > libpng.3.gz
gzip -cn libpngpf.3 > libpngpf.3.gz
gzip -cn png.5 > png.5.gz
===>  Installing for png-1.2.5_2
===>   Generating temporary packing list
===>  Checking if graphics/png already installed
*** Error code 1

This also happens when I try to upgrade the port for Webalizer, which is 
my ultimate goal here.  Webalizer says libpng is not installed but I see 
that is, however, it seems to be a problem with something in 
ports/graphics/png.  I am running FBSD 4.6.2p13.

Any ideas?  Will upgrading to 4.7 stable fix this?

Please send reply to me, as I do not have time to check the list 
archives often.

Thank you,

Kris