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.