If you go to http://ubercart.org/tracker/[USER_ID] then you'll see these warnings:
warning: array_key_exists() [function.array-key-exists]: The first argument should be either a string or an integer in /mnt/stor2-wc2-dfw1/441740/442717/www.ubercart.org/web/content/sites/all/modules/views/includes/view.inc on line 1286.
warning: mysql_real_escape_string() expects parameter 1 to be string, object given in /mnt/stor2-wc2-dfw1/441740/442717/www.ubercart.org/web/content/includes/database.mysql.inc on line 321.
warning: Illegal offset type in /mnt/stor2-wc2-dfw1/441740/442717/www.ubercart.org/web/content/sites/all/modules/views/includes/view.inc on line 1290.
warning: Illegal offset type in /mnt/stor2-wc2-dfw1/441740/442717/www.ubercart.org/web/content/sites/all/modules/views/includes/view.inc on line 1325.
warning: Illegal offset type in isset or empty in /mnt/stor2-wc2-dfw1/441740/442717/www.ubercart.org/web/content/sites/all/modules/views/views.module on line 698.