YoVille will NEVER ask for your password, so please be wary of malicious emails and/or forum posts that request your password, including via web links.
Keep rf'ing, happened to me twice, but I resolved it both times by refreshing like 50 times. LOL! I sent 2 tickets in, hopefully it gets fixed soon enough!
Happens to me every once in a while as well. Comes back soon after too, but it gets irritating. Good luck like others have said above, just keep refreshing.