Using ribbon gui i've detached the dictionary panel from the box on the right (where are the properties).
Now i cannot manage anymore the dictionary panel: if i click on it, nothing happens (except a "beep" that means that the dictionary window is not active) and the dictionary window is not on top (it is hidden by main designer window):

I've tried to deactivate it through "Panels" menu with no luck, then i've tried reverting to standard gui (there it works ok) then to ribbon again, but when ribbon is used this problem appears.
Any help?
Thank you.