Jigsaw_W3C_CSS_Validator is a bot devoloped by W3C.

Latest user agents:

• Jigsaw/2.3.0 W3C_CSS_Validator_JFouffa/2.0 (See <http://validator.w3.org/services>)
• Jigsaw/2.3.0 W3C_CSS_Validator_JFouffa/2.0
• Jigsaw/2.2.5 W3C_CSS_Validator_JFouffa/2.0 [ip:213.32.4.245]
• Jigsaw/2.2.5 W3C_CSS_Validator_JFouffa/2.0
• Jigsaw/2.2.0 W3C_CSS_Validator_JFouffa/2.0
• Jigsaw/2.2.5 W3C_CSS_Validator_JFouffa/2.0 AppEngine-Google; (+http://code.google.com/appengine; appid: s~css-validator-emotika)
• Jigsaw/2.3.0 W3C_CSS_Validator_JFouffa/2.0 (See <http://validator.w3.org/services>)