It’s been pretty crazy reading about the recent hacking into DigiNotar and now recently 4 others. Here’s a full article detailing the attacks. It sounds like all of the major browsers have revoked trust in DigiNotar root certs in their latest versions. The mobile versions of the browsers still need to be updated though and would be susceptible to a man-in-the-middle attack.
These recent attacks definitely leave some questions as to how safe the CA system is.