The webpage informs visitors that the website administrator has set up Anubis, a tool designed to protect the server from companies scraping data, which could potentially cause downtime. Anubis applies a proof-of-work scheme like Hashcash, raising the cost of mass scraping while causing minimal impact on individual users. The tool requires the use of modern JavaScript features, and JavaScript must be enabled to pass its challenge. A no-JS solution is currently in progress.
Duck Rowing ยป Using Core Data on Multiple Threads
http://www.duckrowing.com/2010/03/11/using-core-data-on-multiple-threads/