Just to let you know we are currently tracking a bug in our survey editor when using Firefox 3 with the new Firebug beta add-in installed. With this configuration, the survey will not load correctly. This is becuase of a known issue by the Firebug team. We hope to have a workaround live before the end of today. In the mean time, if you experience this problem, simply disable the Firebug add-in in your browser.
Please visit our support docs for the most up to the date information.