Details on the dreadful "clickjacking" web browser vulnerability have started to emerge. The scariest one is the stealth activation of your webcam/microphone by a malicious Flash app (OMG!). Fortunately, Adobe has now fixed it.
Several issues remain and one can only hope that patches will soon be released for all major browsers. Firefox users are strongly encouraged to use the latest version of the NoScript extension, which does alleviate some of the issues.