when keypad is open to type text screen jumps on android 2.3.4

Question

iScroll version being used: 4.1.3

Android Test Device: Sony Ericsson 2.3.4 Android Gingerbread

There are a lot of problems which happen when the keypad is open. Namely

• The screen jumps up and down when the keypad is open

• The screen flickers for dropdowns

what do you suggest??