I have it too. 1.6 reboots within an hour on 3 different machines I've tried. Two are XP Pro and One is 2k. One is a laptop 1ghz, one is a HT 3ghz, and one is an old Pent 1.7ghz.
I also tried going backwards to 1.3, 1.4, and 1.5 and they all seem to do the same thing.
BTW - I am running...