What steps will reproduce the problem?
1. Create and answer a card with 2 images, which are about the screen heigt each.
2. Try scrolling on Nook Touch

What is the expected output? What do you see instead?
Sometimes it scrolls in the opposite direction for no reason. Also scrolling with Nooks'
up/down buttons won't work in 'Study mode' while it works fine in 'Preferences'.

What version of AnkiDroid are you using? On what version of Android?
0.7 Beta 20 on Nook Touch's Android 2.1

Please provide any additional information below.
Scrolling with the specialized buttons or an optional scrolling bar would be amazing.
Help much appreciated. 

Thanks for all your hard work!