As of 3 mins ago, I still can't check or change any of my seat assignments for any of my flights. Is anyone else having this same issue? I feel like this has been an ongoing problem for at least a week, if not longer. I've called DL IT support, and all they tell me is to delete and reinstall the app. Btw, that didn't solve the problem. So now, I'm left with an app that looks pretty but lacks an important function.