Yes, this dublicated bug, but manipulating with replace or remove locale entries in *.js not resolve this bug. ::))))))))
P.S. This after upgrading from 4.75 ot 4.76
Make sure you close and restart netscape with the bad preferences entries removed. If it still persists, I suggest reporting it to Netscape at: http://help.netscape.com/forms/bug-client.html There's very little we can do about bugs in the netscape codebase.