An independent study has found that IE8 is the browser blocking Malware and Phishing sites.

IE8’s SmartScreen Filter has delivered more than 70 million blocks in the first four months since IE8’s official release, for a cumulative total of 80 million blocks. This data is a strong indication of the value of the protection SmartScreen provides, and of just how widespread socially-engineered malware attacks are on the web today.

IEBlog : Real-World Protection With IE8’s SmartScreen Filter™