Recently I upgraded netscape to version 4.61-1 and now I
can't sart netscape. I downgraded back to 4.51, but also
can't start netscape.
If I delete ~/.netscape (rm -rf .netscape)it works fine for
the first time, but if you close Netscape it's not possible
to start it again.

Environment:
Red Hat 6.0 with gnome and enligtement.
Netscape 4.51 (shipped with R.H.6.0)
Same problem with trying netscape 4.61-4 (common and
communicator)