Boyan, let me try to be more clear. Sorry if im not.
You are experiencing
the same behavior than me for the mentioned telerik demo page (see "screen2.jpg" ive attached). When right-clicking the TV, only your custom context menu appears, which is good. Everything is good for everybody so far.
However, in my app, I use a RadGrid where
both the standard AND my context menus are appearing
at the same time when im right-clicking on one of the RadGrid row (to make my context menu appear). Ive attached "screen1.jpg" that shows it.
Here some code in case it could help:
RadContextMenu markup:
RadGrid Markup ClientSettings
(RowContextMenu function is called on row right-click)
JS:
UPDATE: I also tested your context menu demo containing a RadGrid (
DEMO) and I dont have the issue at all in my Opera, as illustrated in "screen3.jpg".