Adobe PSIRT: Flash Player "Clipboard Attack"
http://blogs.adobe.com/psirt/2008/08/clipboard_attack.html
We are aware of recent press reports about a potential “Clipboard attack” issue that involves Flash Player. Adobe is currently investigating potential solutions to this issue and will update customers as soon as we have more information to provide.
More information and links available from the below source:
http://www.theregister.co.uk/2008/08/15/webbased_clipboard_hijacking/