February 28th marked 90 days that Windows Vista had been available to business customers. December brought the first public disclosure of a vulnerability and February brought the first Security Bulletin affecting Windows Vista. Has it been a good or a bad 90 days for security vulnerabilities?
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But there were 62 vulnerabilties for OS X this year so far and just last week there were 45 in a megaupdate. How did your chart show so few for OS X?