A few days ago, a new vulnerability in Adobe Flash Player was discovered. (http://www.adobe.com/support/security/bulletins/apsb09-01.html)
It is a very dangerous vulnerability that gives an attacker the opportunity to infect the computer of the victim and only thing that victim should do for this is to load an infected web page. The victim must do nothing more than load the page in the browser and he is already infected.
So I would advise to visit quickly the Adobe website (http://get.adobe.com/flashplayer/otherversions/) and install a new version of Flash Player.
You have only to choose the appropriate operating system and browser and install the update.
Incidentally, it seems that the hackers have chosen intentionally Adobe to search their products for security leaks. Last month, Adobe’s fixed 7 Security leaks in Adobe Flash Player.
The fact that the software from Adobe getting increasingly the target of hackers, could be explained by the fact that with the acquisition of Macromedia, Adobe products have become very popular.