ng subscriptions vanishing

Hi, I am using mozilla 1.3, and I have found twice that when I have
opened up Mozilla, the ngs that I had subscribed to are not listed. This
is disconcerting. Any ideas as to what's going on? Do I need to save the
new choices before exiting Moz? I am also using several instances of Moz
on several workspaces (in mandrake 9.1)

Will Napier