Clipboards hijacked in web attack :

Computer security firms are warning about an attack that hijacks the clipboard where copied text is stored.
The attack puts a hard-to-delete weblink into the clipboard that, if followed, leads people to a website selling fake security software.
The code that inserts the link has been found in flash-based adverts seen on many legitimate websites.
The attack on the clipboard has hit both Windows and Mac users of the Firefox web browser.