I think app management is just plain a bit buggy in the 2.0 release. I've had a number of apps crash repeatedly (including safari, which crashes more often then it used to). I've had apps that have to be reinstalled to work. OmniFocus once even completely crashed the phone (or some resource it called, I'm not blaming Omni). As soon as I touched the icon, the screen flickered and then white apple logo and reboot.
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