When the Danger Mission update was loading up, (Once it got to 40ish%), it said
"The application has failed due to the following error: Server returned HTTP response code: 503 for URL: http://download.threerings.net/spiral/20120620234015/getdown.txt
Please Visit
http://wiki.spiralknights.com/Technical_Issues_FAQ for information on how to handle such problems."
Help?
Usually a refresh should solve that