Not sure if it will help or not, but have you tried recalibrating the screen? Instructions are below:
Recalibrating the G-sensor
[FONT=Gotham Light,Gotham Light][FONT=Gotham Light,Gotham Light]Recalibrate the screen if you feel that the screen orientation does not respond properly to the way you hold the phone.
From the main Home screen, press MENU , and then tap [/FONT][/FONT]Settings[FONT=Gotham Light,Gotham Light][FONT=Gotham Light,Gotham Light].
Tap [/FONT][/FONT]Display > G-Sensor calibration[FONT=Gotham Light,Gotham Light][FONT=Gotham Light,Gotham Light].
Place the phone on a flat and level surface, and then tap [/FONT][/FONT]Calibrate[FONT=Gotham Light,Gotham Light][FONT=Gotham Light,Gotham Light].
After the recalibration process, tap [/FONT][/FONT]OK[FONT=Gotham Light,Gotham Light][FONT=Gotham Light,Gotham Light].
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