It sounds like the font's Bundle bit is on--it should be off.
You might try this:
1. Delete the font and Netscape.
2. Rebuild the Desktop.
3. Install the font.
4. install Netscape.
If the font's Bundle bit is on, or if the font contains a BNDL or FREF resource 9which no font ever should), then the only way to fix the problem is to install Netscape AFTER you install the font.