The article doesn't appear to mention the root cause, its very long and somewhat difficult to read - but it might be me, its early sarurday morning here. But,w

The article doesn't appear to mention the root cause, its very long and somewhat difficult to read - but it might be me, its early sarurday morning here. But,what was the root cause? I'd expect to see that in the first paragraph of a post-mortem. Was it a buffer overflow, an unhandled exception because xyz? Did I miss it?