Jack Byrnes: I'm watching you.
Greg Focker: Yeah, well I have eyes too, so I'll be watching you... Watching me.
When Jack is doing a search for "Andi Garcia" on Google, the links show up in the searches he does as purple and not blue which means that they have already been visited, despite the fact that he's supposed to be doing this search for the first time.
Originally, Dustin Hoffman turned down the film due to his dissatisfaction with the screenplay. Hence him being in Spain learning the Flamenco. Poor test screenings lead to him changing his mind and being inserted into the film via costly reshoots.