Google said investors should pay no mind to an internal financial forecast that was posted on its website by mistake and referred to concerns about narrowing advertising-profit margins because of tougher competition, reports the Associated Press. Google's revenue would rise about 55 percent this year, to $9.5 billion, according to the projection.

In an SEC filing, Google said the notes, posted after last week's Google management presentation to analysts, "were not created for financial planning purposes, and should not be regarded as financial guidance."

The inadvertent posting noted that Google's rivals would likely attempt to lure away advertising partners.