If you use Adobe Flash, please make sure that you have updated it to:
http://www.securityfocus.com/news/11574
I strongly recommend the use of Secunia's "PSI" (Personal Software Inspector)........... in a few minutes it will scan your system and let you know what needs updating.
http://secunia.com/vulnerability_scanning/personal/
It is free for home users :)
It usually gives you a clicky to go straight to the update site :D