My menu page looks fine if I use a desktop browser, but if I use a smart phone, there is no menu in the usual place (at the top RHS of the screen).
Turning off/deactivating Nextgen restores the menu – the other plugins I am using give no problem.
I am using NextGen v 2.0.66, and theme Weaver II v 2.1.10 which is designed to be mobile aware.
I have installed a plugin that does allows me to show a menu on a mobile device, but that is a less that ideal solution.