Some journalists continue to receive the warning from Google
about state-sponsored attacks that we mentioned
last week. The message appears on top of logged-in services like Gmail.
Occasionally it will disappear for a few hours and then reappear, but there is
no way to remove it.
from Committee to Protect Journalists http://cpj.org/internet/2012/06/what-to-do-if-google-warns-of-state-sponsored-atta.php