Danyrius said:

Hi,

when I open my palace window, I see a negative upgrade time (in seconds), which also changes when I change my hero set.

Is it safe to start the upgrade or do I waste lots of resources and boosts when i do so?

Cheers,

Dany

Honestly I would have had to try it, couldn't have passed up the chance to see if it would work. Lol 

Frank Rizzo said:

BTW Dany, any suggestions for those of us that never get gold nuggets so we're stuck at palace 31? Several of us on the forums are just sitting around waiting for nuggets. It's only been a week for me but the bank never offers them and no even that we've had allows you to win them. 

Frank, I'm not really sure how I got my first nuggets to start palace 32, but I think it was a bank offer. As it happened I just had nugget-offers in the bank for the last two days (or was it only day one of CvC?).

I think as soon as you have palace 32 you get the nuggets and obsidian from some global event's (personal) checkpoints. You'll also be able to get them by farming lvl8+9 resource tiles as they drop special coffers.

Edit:
I also answered here (Bank packs) including screenshot as the packs are available right now (for another 24hrs).

Support says:

Dear Dany,

Thank you for your message.
I am sorry you faced this situation. Our specialists are doing their best to resolve any issues as soon as possible. Also, I would like to mention, that it is just a displaying issue. The actual time of the upgrade is correct. Anyway, the matter will be resolved in the near future.

Have a good day!

And got fixed with the last maintenance: