Reported by bgaraventa on 2012-01-03 19:28
After opening an ARIA menu, it's not possible to navigate the menu using the up/down/right/left arrow keys since standard buffer navigation remains enabled. Insert+Space has to be pressed to force NVDA into form type navigation before this functionality will work correctly.

Steps to reproduce:

1. Visit
   http://whatsock.com/modules/aria_tabs_menu_modules/demo.htm
2. Activate the Options menu button, then try to navigate using the arrow keys.
3. The only way to make it work is to press Insert+Space to enable form navigation, tab to the Options button, then use the arrow keys. Otherwise NVDA navigates out of the menu causing it to close.