No, the chests stay in the chestvault as long as the servers live and the other winnings your account gets automatically.
Now it doesn't even show the login window - just "CardHunter is currently down for maintenance. Please try again in a few minutes".
Yes, Let the man work in peace. No need to report anything that's probably part of the process or spam the thread, now that they're on it.
I get through the server status check and the credentials dialog. Then this popup pops up: "Login failed: The server is currently closed for maintenance. Please try again later." EDIT: Same after clearing the cache (Firefox).