The RadRibbonView supports Prism5 and we are not aware of any issues on the matter. I have tested the application provided by Tina with our latest binaries and using Prism5 and it works as expected. Please note that I have noticed a few differences between Prism4 and Prism5:
- instead of using the old one "Microsoft.Practices.Prism.dll" the core logic is now in a new binary "Microsoft.Practices.Prism.Composition".
- you need to change the schema for the regions from " xmlns:regions="clr-namespace:Microsoft.Practices.Prism.Regions;assembly=Microsoft.Practices.Prism"" to "xmlns:regions="http://www.codeplex.com/CompositeWPF"" in order to match the new namespace.
These were the two steps that I needed to modify in order to run the project.
I hope this information helps. Please let us know if you need further assistance.