Ok, so... Iphone 4, with ios 7 beta 2, with restore and setup as new iphone:
-the dock changes its color only if I reboot
-launch m. tasking and than go back, you won't be able to swipe n. center, it works if you change a page in home screen
-when listening to music, the double click in lock screen doesn't work, only if I pause the music
-control center still has that plane grey colour
-9gag app has a little blue dot near the text which tells the app name
-scrolling through songs is kinda laggy
-folders are a bit laggy
-after a few hours of not using the iphone, the clock in the lock screen goes to the middle of the screen
-sometimes, the elements in status bar in homescreen turn black, I am using that default wallpaper with stars or galaxyes, whatever...
-turning the phone on by pressing the sleep/wake button takes a bit to light up.