Encore CS6: Blu-ray build error 13: <button> invalid duration
I haven't used Encore for a while but was called upon to create a DVD and Blu-ray. I'm hoping there might still be some users out there with some insight into my issue. I can't fidn any reference to this error online.
My project has one timeline with multiple chapters of a dance performance. There's a main menu, chapter selection menu, performer bio menu, and a menu with info about the dance studio. The first three menus have motion backgrounds and their buttons all have a 2 second transition.
I built a DVD without issue, but the Blu-ray is failing (I'm using exactly the same project). After transcoding and importing assetss the build dialog shows the following error:

I went to the menu stated in the error and removed that button, but got a similar error referencing a different button on a different menu. All the buttons on every menu are the same style: a text layer with a single highlight. I tried removing the motion backgrounds, and that didn't help.
Removing the transitions did allow me to build successfully. I see in the Help that transitions are not supported for pop-up menus, but mine are normal menus.
Are button transitions not supported for normal menus either?
