MatthewHSE - 8:45 pm on Jun 15, 2004 (gmt 0)
That's it. Since preferences are stored in your profile, that preference - and the option it belongs to - were carried over to your new installation. I doubt it's doing anything, though I suspect it might detract from overall performance. Until 1.0 comes out, FireFox will always give better performance with a new profile after upgrading.