I am getting the folowing message when trying to run netscape.
[root@ns1 /root]# netscape
netscape-communicator: program is version 4.74, but resources are version
4.73.

	This means that there is an inappropriate `Netscape' file installed
	in the app-defaults directory.  Check these environment variables
	and the directories to which they point:

	$XAPPLRESDIR
	$XFILESEARCHPATH
	$XUSERFILESEARCHPATH

	Also check for this file in your home directory, or in the
	directory called `app-defaults' somewhere under /usr/lib/.[root@ns1
/root]# 

Also when deinstaling netscape components
netscape-common-4.74-0.6.2.i386.rpm
netscape-communicator-4.74-0.6.2.i386.rpm
netscape-navigator-4.74-0.6.2.i386.rpm
the following directoried are left behind in:
[root@ns1 netscape]# pwd
/usr/lib/netscape
[root@ns1 netscape]# ls -al
total 56
drwxr-xr-x    6 root     root         4096 Jul 29 12:22 .
drwxr-xr-x   96 root     root        36864 Jul 29 10:29 ..
drwxr-xr-x    2 root     root         4096 Jul 29 12:22 de
drwxr-xr-x    2 root     root         4096 Jul 29 12:22 es
drwxr-xr-x    2 root     root         4096 Jul 29 12:22 fr
drwxr-xr-x    2 root     root         4096 Jul 29 12:22 ja

I think thise should be removed after complete removal of netscape
components