Netscape 4.7 crashes whenever a portable network graphics
(.png) file is encountered on my machine.  I can re-create
the problem every time by visiting a page with a .png
graphic.  For example:

http://www.cdrom.com/pub/png/


[root@XXXXXXX RPMS]# rpm -qa | grep netscape
netscape-communicator-4.7-1.1
netscape-navigator-4.7-1.1
netscape-common-4.7-1.1

[root@XXXXXXXXX RPMS]# rpm -qa | grep libpng
libpng-1.0.3-4
libpng-devel-1.0.3-4

This used to work with older versions of Netscape (Pre-
RH6.1 upgrade)