Did Zach Galifianakis Object to Mel Gibson's Cameo in The Hangover 2?

Does Liam Neeson have Zach Galifianakis to thank for his new gig on The Hangover 2?

Director Todd Phillips announced this week that Neeson would replace Mel Gibson in the film after unnamed members of the cast and crew raised objection to Gibson's participation.

Mel Gibson dropped from The Hangover 2

In a recent interview with the Comedy Death Ray podcast, Hangover star Galifianakis expressed concerns about a movie he was filming at the time, without naming it. "I'm in a deep protest right now with a movie I'm working on, up in arms about something. But I can't get the guys to [listen] ... I'm not making any leeway."

When interviewer Scott Aukerman asked if he was talking about The Hangover 2, the 41-year-old actor cut him off. "It has something to do with a movie I'm working on, yeah," Galifianakis said. "I'll tell you about it later. It's very frustrating."

Do you think he was referring to the Mel Gibson cameo?