Hi Roberto,
No, I think not a bug.
Firstly - the Browse has a "Form Procedure" set.
<< The double clic opens up my browse even though I have all my buttons insert, change, delete, view all as not available.
There's no "functional" relationship between the visibility of a "change" button (either under the browse, or in row) with the Doubleclick.
there is a relationship if there is a "Change Condition" set - in that case the condition will be applied to the doubleclick as well.
You can disable the double-click on a specific Browse using the change condition, or the drop-down on the Change button tab.
Cheers
Bruce