Given that they are both former members of Metallica, one would think Dave Mustaine and Jason Newsted would get along famously. However, that appears not to be the case, as we learn that Newsted's self-titled band has been thrown off an Australian tour by headliners Megadeth.

"At the request of Megadeth, Newsted will not be playing the below sidewaves and instead will be replaced by Whitechapel," reads a message on the website for the Soundwave Festival, a package tour that will hit five Australian cities between Feb. 22 and March 3. The "Sidewaves" are theater shows put on the festival's organizers and featuring many of the festival's acts. Newsted were slated to open for Megadeth on Feb. 25 in Sydney and Feb. 27 in Melbourne.

Loudwire reports that Megadeth and Newsted appeared together during last summer's Gigantour without incident. Newsted even sat in and sang lead with Megadeth on 'Phantom Lord,' a Metallica song co-written by Mustaine, at one show. Soundwave promoter AJ Maddah has been responding to fans' questions about the decision. "Something has certainly gone down although we have no details," he tells one person. "Maybe there is a problem between managers or agents," he tells another. He does say that the inclusion of Whitechapel was Mustaine's choice.