Mozilla has confirmed a security vulnerability in Mozilla/Firefox/Thunderbird (see the announcement here). You download either a patch or new versions (Mozilla 1.7.1, Firefox 0.9.2, and Thunderbird 0.7.2). It affects only the versions running on Windows (why am I not surprised) so if you are using a Mac or *NIX this does not apply.
While no one wants to see security problems in their software, it is heartening to see Mozilla owning up to the problem and fixing it in one day. Compare this to Microsoft's typical behavior of first attacking the person who discovered and reports the problem, then denies it's a problem, then admits it a problem but insists it is not widespread, then admits it is widespread but fixing the problem will take time because their browser is integrated into the operating system, to releasing a fix that doesn't (fix that is), to releasing a fix that works but also breaks an earlier fix, to a fix that works but doesn't break anything else. You decide which company you trust. The one that fixes its mistakes immediately or that "den of scum and villainy."
Have a Great Weekend Everyone - Aloha!