Share your experience!
I found that the top edge (esp. top right hand corner) of the screen is not really "senseable". I need to press a little bit harder then other part of the screen in order to get the response.
I tried with both my glass protector off or on (apparently I have to get a new one after I took one off)
Should I just go to the Sony store and ask for maintenance?
well I repaired it twice but the touch screen is not responding. I have pressed the keys 100 times but doesnt work. Rebooted mutliple times. It did respond once to a certain extent and then stopped again. I am thinking it has got condenstion inside. It was working fine till today morning... this is a brand new phone and it has been only 2 days since I bought it. they will rpelace the handset but i do not want to go through those complications. 
just recieved my xa. seem to have the same problem a dead zone develops at the top edge and makes pulling the notifications down an issue. it seems to fix itself when i lock then unlock the phone but after 30 secs the problem redevelops. really hope this can be fixed soon. 