I have seen all (I guess) the issues complained with the L1520.
I have had my screen replaced now few times, and its going in next week again!
First I noticed my screen was maybe half mm higher on the right side, took it in and they said the glue has given away and replaced it. When I got my device back, the vibrator was making crazy noise, so I had to take it in for few more hours to get that replaced.
About 3-4 months later I noticed white spots on the screen. These strange white spots are visible on white backround and look little like light is bleeding through.
I took the phone in and they replaced the screen. Same evening when I picked it up, I see again white spots on the screen and take it in agian the next day. Again a new screen.
After 3-4 months use again I see similar spots have appered again. I didnt take the device in right away and now I have started to get phantom presses of the search button. Sometimes the voice search goes on when pressing camera button and its really annoying.
Oh yeah, and of course I have had the phanton swipe/double tap bug, but with that I can live with. After the last screen change these were less. Im sure this is present in every L1520, people might not just realize it. Also the way you swipe affects it and you can learn to swipe so that it happens less, but still, its not normal.
Now Im buying a L830, so most likely when I get the L1520 fixed again Im selling it.