The sample project here
exhibits odd behaviour when trying to bind a manually created backbone collection to two different views. If you run the code in 5.0.x.GA you can see words displayed on the screen which you can scroll through. Clicking the settings button reveals the same words (same collection) in a table – clicking the top right button will "reset" the words and change the collection.
Run the project in 5.0.X and it works fine
Run the project in 5.1.X and it crashes / hangs when attempting to render the second list (clicking settings) and also crashes trying to reset a collections contents.
Run the project in 5.1.X with "execute in main thread" set to TRUE and it works as expected.