We started to work with the ribbon of access 2010. i was able to create a working ribbon on 1 exception. When I wanted to add a contextual tab it seems for me impossible to get a valid xml.
The code works fine until I add te group element in a contextual tab. then my access application uses the default access ribbon. I added the buttons i wanted to add in a normal group/tab on the ribbon and then there is no problem with the loading of the ribbon.
I heard it was impossible in Word and Excel to make use of the contextual tabs, but that this option was available in the access.