The launch of the movie version of Ender's Game was beset by controversy caused by the anti-homosexuality views of Osron Scott Card, the author of the original book. The book doesn't itself contain any obvious anti-gay message but activists really took against the author.
Having said this, the nickname for the insect-like aliens in the book is "Buggers" (presumably because they are bugs). But the movie uses a different nickname, "formics" (presumably because they resemble ants).
Was the name changed because of the controversy and sensitivity over the misapplication of the bugger name or was there a better reason to adopt a different nickname?