I installed Papyrus in Eclipse Juno, and I tested class and composite structure diagrams. Everything seems ok.
However, I failed to edit component diagrams.
The creation of a new component diagram works good, but when I tried to drag and drop a new component in the diagram, nothing is displayed.
It seems to be a problem of font/shape color/size.
When I close the tab of the editor, it displays a NullPointerException.