I don't know if this bothers anyone or not, but to me it's like ****.... I have none of the "Serious" issues mentioned above, at the same time my concern is at the top priority.
The issue is the proximity does not turn OFF when using headphones in a call, Just make a call and use handsfree to do talk, since you are using handsfree, you are likely to look at other things or check facebook while in a long conference, but the phone would not know that I am using handsfree and it does not need to check for proximity.
But my Omnia W, can't resist the temptation and would not allow me to touch the top right corner of the screen, because as soon as my fingers would proceed there, it will turn the screen off and when removed, I will be back to the call screen.
Hate this Feature