I've just acquired the Archangel armor in XCOM: Enemy Within and I'm not able to ascend when in Flight Mode. I activate Flight Mode, my sniper levitates slightly off the ground, but I'm not able to find ANY way to make myself ascend levels at all like you see at the beginning of this YouTube video.
I'm not getting the movement indicator box above my soldier at all when hitting the key I've mapped to Ascend Floor. The screen shifts but no indicator box.
I'm playing using a trackpad on OS X, playing the Steam version of the game. I've tried plugging a mouse in to use the mousewheel for Ascend but no effect.
I made a quick screen recording of what I'm experiencing. You can see that I'm activating Flight Mode and then both scrolling the mouse wheel (which is bound to Ascend/Descend) and using the on-screen buttons. When I've "Ascended" there's no movement indicator to show I'm flying up, but when I click around on the map you can see that the movement indicator that stays along the ground is no longer aligned to where I'm clicking.