New issue I have just noticed in the past couple of days... when I go to redial a number from my recently dialed contact list, if I press the green phone handset (which ordinarily would immediately dial back the number that called me), I will get a random recent phone number instead of the intended. This doesn't happen all the time (like just now when I went to check the behavior), but it has definitely happened a few times to me so far. If I select the contact, that seems to work fine.
The next time it happens check your battery usage and see if there's a process called RLID burning more than 2%.