I' ve replaced my Liberty (here is Gratia) screen with one from China too, and every thing is working fine but the light sensor seems to be miss-aligned.
I mean, when receiving a call, I can see all and answer, after answering the screen goes black and after this I cannot end the call and have to wait for the caller to end the call.
The screen only turns "on" again if I put the phone near a big source of light powerfull lamp or direct sun light.
How to solve this?
HTC P3600 black PTG
XDA II WM5
SD UltraII 1GB