Hi there,

That’s just your widget area re-setting after the update. Widgets don’t automatically carry over. If you go to appearance>widgets from the wp-admin. You’ll see the inactive widgets at the bottom on the left, and the frontpage widget area and the sidebar widget area. Just slide the widgets back into the relevant sidebars to get them to display again 🙂

Screenshot: http://screencast.com/t/ijyChDIW