Blimey!
Just popped in to see if anyone else was experiencing something weird with the ports this morning - I suddenly had friends whose cities had diminished to a minuscule size, were on very low levels, had no road connections to their ports, and yet seemed to be able to fill containers...
And I discover all this has happened overnight! :-o
My game seems intact, so far - I did click on an icon, can't remember which one but probably the Sale icon, and the game re-started, but fortunately for me nothing had changed. This truly is about the luckiest I have ever been with this game (since GI are always telling me I'm just plain unlucky most of the time). I'm now backing up my iPad to iTunes, as suggested earlier in this thread, just in case...
My heart goes out to all of you who have experienced resets; I hope they manage to get this sorted out for you, it must be absolutely galling for many of you, and especially people who've invested in the game (in fact, if they don't resolve the issue or offer any compensation, I'd send your credit card statements and a formal complaint to GI and to Apple!).
Fingers crossed it gets fixed soon. As somebody suggested, maybe it's a GI server issue and they'll be able to restore you all to your former glory.
Steve
Player name: SteveGPI
City name: Hanham
Level: 53 (at the moment!)