When Qui-Gon, Jar-Jar, and Padme are eating at Anakin's house, Anakin's mum pours water for Qui-Gon. But when she gets to Jar-Jar, she tips the pitcher but no water comes out.
Senator Grebleips, who appears when the Queen of Naboo speaks to the senate, is an alien from "E.T." making a cameo appearance. This is after Steven Spielberg ('Grebleips' is 'Spielberg' backwards) included some "Star Wars" references in "E.T."