Microsoft’s Black Tuesday software updates caused problems for some of its customers. Microsoft rereleased the Exchange update, which had broken the content index used for searching for mail on the server. The company is still researching the problems with the kernel and Active Directory updates. Common advice for companies is to apply software patches as quickly as possible, experts say. Increasingly, software complexity has made the interactions between patches more difficult to predict, says Amichai Shulman, chief technology officer with Imperva.”]