I am going to perform a hard reset soon. I agree with the others that it's a good idea at the best of times, but this build seems to be particularly grumpy without a hard reset. I'm experiencing random, bizarre issues, like notifications causing the hardware buttons to become unresponsive, including Start, search, back, etc. while the whole while, the touchscreen is responsive (can scroll sideways to all apps, etc. but not scroll down the notification centre). Also having issues where waking the phone up, I get my lock wallpaper, but no number pad to enter my PIN. Seeing some of the flickering that others have been mentioning, as well as slow load times on some apps, including the Store. On the bright side, I've been downloading a lot of apps and pinning them to see if I get the Loading... loop, and so far, fingers crossed, nothing... but I still don't think I'm at the numbers I was before.