Using the Kendo Menu demo (copied into this dojo: http://dojo.telerik.com/@richm/UgAPe), I observed the following using the latest version of NVDA:
1. In Chrome, navigating to a submenu doesn't announce the submenu item, but 'list' instead. E.g. in the dojo example, use the keyboard to navigate to Furniture, then right arrow. NVDA announces, "list", though the visual focus is on the first sub-menu element ("Tables and Chairs"). Pressing down arrow properly announces the second item, "Sofas".
The user will not know the first item in the list unless the navigate away and back to it. It is also a bit confusing that they are now on a submenu.
2. Same scenario, but in Firefox. Navigate to Furniture and select right-arrow. The sub-menu opens, but NVDA's focus remains on "Furniture", and NVDA again announces the furniture item. Pressing right arrow again closes the entire menu. If instead down-arrow is pressed, suddenly Sofa is selected.
Please advise if I should open bugs, and if any workarounds are available.