I upgraded my iPhone 4 from 4.01 to 4.3 when it came out, and among other issues, the most maddening for me was the fact that slide to unlocked won't register like 1 in like 5 attempts. I went back to 4.01 and sat there locking and unlocking like 30 times in a row, it it was perfect each time. Then I tried 4.31 and it was the same crap. Also, I updated my friends 3GS to 4.31+ JB the other day, and he called me complaining about the same thing. I asked around and a few others have mentioned this annoyance. But how many have this issue? What's the deal?