The search button fittex (search) encountered a momentary metamorphosis on Tuesday evening when the word on the button was changed to the standard Maltese insult of calling somebody a penis in a can.
Note: Feel free to insert quip here about the hacked search button. (-:
According to the article, the Googleplex acknowledges the problem but would not comment on the cause.
Postcript: This blog reports that the problem didn't come from hacking but with the Google program that allows people to translate parts of the Google site.