On March 18th, Apple released the Safari 3.1 web browser for Windows and the Mac. With the release, Apple also included Safari 3.1 with Apple's Software Update service on Windows. It was labeled as an update with the option to install pre-selected. The update has been pushed to millions of Windows users of Apple's other software products, like iTunes. Normally, Apple's Software Update service is not used for delivery of new products. Clearly, this is a calculated risk by Apple that has annoyed and/or alienated some users.
However, the question is, did it work? Did Apple gain browser market share on Windows based on this move? The answer is yes.
Safari 3.0 on Windows never gained much market share, peaking at .07%. However, Safari 3.1 on Windows is rapidly gaining market share, already tripling Safari 3.0's peak.
Note: As of April 18th, Apple's update now lists Safari as 'new' software if not already installed.