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Purple_Martin - 3:18 am on Dec 9, 2004 (gmt 0)
It's IE5, and not IE6 so much, that is the source of the migration
IE5 (12.8% --> 4.9%)
IE6 (71.3% --> 68.0%)
Yes, that could be it.
Or...
It could be that IE5ers are upgrading to IE6, and lots of IE6ers are upgrading to Moz.