Spreadsheet based Apps that were published as services had URLs of this form: https: //spreadsheets3.google.com/a/macros/my-domain.com/exec?service=AKfycbwly1SYZhdnPOoKfkH_xB7oMKDeYifYm8M
Today, these URLs are resulting in an error page with a Google Drive logo and the message "Google Docs has encountered a server error. If reloading the page doesn't help, please contact us.". They have an HTTP 500 error if you look at the headers.
Google appear to have changed their URL scheme for published scripts. I couldn't find any advice or release notes re this. They are now of the form: https: //docs.google.com/a/macros/my-domain.com/s/AKfycbzvopSddGc3E4KL_nLmxR2fgOXLxNvmliBgXkiJ/exec
To get the new URL, go into your script > Publish as Service... and copy it from the URL box.
I've raised this in the issue tracker: http://code.google.com/p/google-apps-script-issues/issues/detail?id=1399
Please provide the requested information there (the full URL), either in the issue tracker to directly to me via email if you don't want to share it publicly.
