Well, the rule of thumb is that if you need stability, never upgrade on the first day of release but rather wait for 1 week or two. I personally have faced and

Well, the rule of thumb is that if you need stability, never upgrade on the first day of release but rather wait for 1 week or two. I personally have faced and upgraded my apps through many of these upgrades and there was rarely an earth-shattering issue that I was not able to solve. YMMV.