John Dvorak of PC Magazine makes a very compelling case that Internet Explorer is Microsoft’s biggest ever entrepreneurial blunder. “If the problem is not weird legal cases against the company, then it’s the incredible losses in productivity at the company from the never-ending battle against spyware, viruses, and other security problems. All the work that has to go into keeping the browser afloat is time that could have been better spent on making Vista work as first advertised. All of Microsoft’s Internet-era public-relations and legal problems (in some way or another) stem from Internet Explorer. If you were to put together a comprehensive profit-and-loss statement for IE, there would be a zero in the profits column and billions in the losses column—billions.” (Thanks Sean Corrigan and FirefoxGeek)