bugtraq reported that Netscape 4 up to including 4.72 has a security
problem with SSL connections (that could give people credit card details
via SSL secured shopping). The bugtraq id is 1188.
Netscape have released Communicator 4.73 which solves the problem.
I would suggest that the Red Hat Netscape packages need upgrading to
version 4.73 to cover the problem.
Sorry if this is already in progress but I could not see another bugzilla
entry about it.