Did Zac Efron and Vanessa Hudgens have an awkward run-in?

Even though Vanessa swears that she and Zac "are good" after their split, things definitley got awkward when she and her ex showed up to support BFF Ashley Tisdale at the premiere of Sharpay's Fabulous Adventure. On the red carpet, both were happy to pose with Ashley, but steered clear of one another and wouldn't allow photographers to take their picture together. Inside the party, sources say "Zanessa" avoided each other and tried to keep the night drama free for the sake of their friendship with Ashley.