SSL Transitive Trust
Is your browser vulnerable to common SSL flaws? Find out here: http://ssltest.offenseindepth.com/
From this great article on SSL:
While the flaws can be difficult to test, many can be exposed by visiting a web server that intentionally presents a malformed certificate and observing the result. To ease this process, Dell SecureWorks researchers have developed a website (https://ssltest.offenseindepth.com) that tests for many of these flaws.