Please go and update your Greasemonkey now! Authors warn that there is a very serious security hole in all versions GM* API disabled. It might break some of your scripts, but if you are like me, and use GM sparingly, you should be fine. The little blogger script I use still works!
Please note the newest version didn’t go through the automatic update feature yet. I had to go pull up the Extensions dialog and update it manually. The auto update might catch it sometime soon, but I figured I’ll patch it as soon as possible.
Fortunately, there are no known exploits yet, but better safe than sorry :)