I noticed the same issue with the Search/Cortana button on my L830 with a Skinomi screen protector on it - sometimes would work (10% of the time). Took it back to AT&T, and they said it could be the screen protector brand. So, the rep peeled off the Skinomi, and we both confirmed that the search button works fine without the Skinomi. The rep then put on a Zagg Dry screen protector which is "guaranteed" to work with any phone (I had to pay for it). Same thing happened with the Zagg: search button worked sometimes. So, AT&T switched out my phone with a new one, put on another Zagg Dry, and same issue happened. Since it works fine without the protector, I decided to get a free Zagg replacement and install it myself since the AT&T did a crappy job (air bubbles and dust). Before I applied, I used a hole puncher to punch a hole in the protector where the Search button is located. Works much better now; however, I still do see issues of it not registering my touch at times. I would say it works 80-90% of the time now. Sometimes going back to the home screen via Windows or Back button and then hitting Search resolves the issue. I have talked with others who have the phone, and they have noticed the same issue even without screen protectors. Windows and Back buttons work perfectly fine for me with the protector on. Hopefully, this is just a firmware fix that is in the works, but it does seem like an issue affecting a lot of phones. The only good thing that came out of my experience is now have screen protector replacement for 2 lifetimes - one from Skinomi and one from Zagg. :eck: