Latest Potlatch, plus TomH's GPX fix

app/models/trace.rb

@@ -110,6 +110,7 @@ class Trace < ActiveRecord::Base
         tp.lat = point['latitude'].to_f
         tp.lng = point['longitude'].to_f
         tp.altitude = point['altitude'].to_f
+        tp.timestamp = point['timestamp']
         tp.user_id = user.id
         tp.gpx_id = id
         tp.trackid = point['segment'].to_i