Netscape 4.76 places a file called nsreg.dat in the system directory, which needs to be writeable by anyone who uses Netscape 4.76. By default, files in the system directory are not world writeable, so we have created a policy for the EECS domain which will reset the permissions on this file. Client machines in the EECS domain will refresh this policy every ninety minutes, give or take a half an hour. You may need to wait as long as two hours for Netscape 4.76 to work properly. We suggest you wait this long before trying to run it at all.
Higher versions of Netscape do not have this problem, but do not offer all the features of Netscape 4.76.