So I see that I am not the only person to get those libXpm.so.4 problems with Netscape. And yes, I did install both libc5 and "libc6."
I have just installed hamm distribution (kernel 2.0.34) onto my system, and X won't let me dial out. Even worse, to dial in, I have to reboot the system! There are no error messages, just that the modem won't respond (tested it myself). Sysinfo: i486 with GVC 14.4 modem on ttyS3