Further confirmation comes from a listing on Amazon Instant (with NCircle listed at the Studio) with a runtime of 88:36 (it still missing the Warner Vision logo though).
The version I’m currently watching on Amazon Prime has the same run time yet I so far noticed one scene is still missing! The scene where everyone first arrives at the barn and Gumby’s band sets up before their first jam. It cuts from the end of the scene where the group decides to have benefit concerts right to the jam!