How serious is the market share loss of Microsoft’s Internet Explorer?

Last month, Microsoft’s market share in the browser dropped below 70% for the first time in eight years, while Mozilla broke the 20% barrier for the first time in its history. Initial data sets provided by Net Applications suggest that the Internet Explorer will drop once again significantly in December to below 69% and Mozilla will climb above 21%. IE8 is just around the corner, but current market share data suggests that Microsoft has no effective tool to stop the bleeding at this time — and Mozilla can pick up two out of every three users Microsoft surrenders