Netscape blows away preferences.js file when disk is full

[Bob Horvath <bob@horvath.com>]

I am seeing a recurring problem that is quite annoying.  My disk
space is at a premium.  If I am doing something and the disk
fills, I first get a "Error saving bookmarks" error.  Netscape
doesn't crash, but upon stopping it and restarting it, all of the
preferences are gone.  The preferences.js file is blown away to
have a length of zero.  I have to go in and reconfigure all of the
mail and news servers, as well as any other preferences in there.

Anyone else seen this?  How would I report this to Netscape?