Many of these people have actually updated. Several people posting here right now cannot access each other's towns. It is widespread problem so I'd wait until the forum settles down and people start making threads like "I CAN VISIT MY NEIGHBORS AGAIN!!!"
I finally took the time to go thru my friends list and quite a few hadn't been on in a week or longer so they got the boot today
When you go into the screen with other towns and tap the origin icon, you see a list of all your current friends and their last login time.
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