Like a question you'd see on the LSATPeople over at Vitalsecurity have found a flaw in Java that would allow an applet to launch Internet Exporer from any browser and exploit an IE flaw to do potentially bad stuff to your computer. Ironically, the best way to prevent against falling victim to this specific flaw (next to being careful abot what applets you give permission to run) is using Internet Explorer. Microsoft has patched this flaw but obviously hasn't fixed it thoroughly enough.
I wonder how they're going to fix this. It's not so easy to update Java and get users to apply a patch on a large scale. It hardly seems right to expect browser developers to do something where you stop Java from launching IE. This seems a bit like an LSAT question my sister told me about where you have to assign liability, I'd say it's still MS's fault and they need to really fix their browser software. This begs the following question: Is it safe to even have IE on your computer? And that question begs another. Why are you still using Windows? Ok, I guess I'm taking this too far :)