To Get Symbol Font Working Properly in Netscape Navigator 6 or 7, follow these directions:
 
Using a text editor like WordPad, open the file 
\Program Files\Netscape\Netscape\res\fonts\fontEncoding.properties  
The "Program Files" directory (folder) is generally on the C: drive but could be elsewhere on machines with custom installations.
Find the line reading 
encoding.symbol.ttf = Adobe-Symbol-Encoding
This should be near the top of the "fontEncoding.properties" file.
Change this line to read
encoding.symbol.ttf = windows-1252
Then save the "fontEncoding.properties" file,  close any open Netscape windows, and re-start Netscape.  You should now have the symbol font.
Go back to the Technology Requirements page and verify the symbol font is working.
These instructions were found at the following website:  http://www.alzforum.org/res/com/ant/NetscapeSymbol.asp.  They worked on our PC; hopefully they will work on your machine too.
Copyright © 1999-2004 Doris Jeanne Wagner and Rensselaer Polytechnic Institute.  All Rights Reserved.