Julie188 writes "Mystery solved! Microsoft's latest emergency out-of-band patch was weird beyond belief. A notice was sent to journalists and researchers late Friday evening that the patch was coming Tuesday, but Microsoft refused to explain the flaw and even put a cone of silence around researchers who would have otherwise talked about it. But finally, one researcher broke ranks and explained that the patch was caused by a flaw introduced in Microsoft's own development tools. This flaw was also the source of the emergency ActiveX patch, which took about 18 months to complete and which supposedly fixed the problem by turning off ActiveX (setting a 'killbit' on the control). Researchers at Black Hat on Wednesday will be demonstrating how to override the killbit controls and get access to vulnerabilities supposedly stopped with a killbit. What's really scary is that Microsoft has issued 175 killbits fixes so far."