If you are encountering this error, please be sure to SAVE your project when you are done editing before attempting to publish (to avoid any lost changes).
Here are some steps you can take...
- Ensure Javascript is enabled
- If you happen to be using Firefox and have Firebug, please post any errors reported by Firebug.
- If it seems to be spinning forever, click "Edit" and to go back. You can then attempt to preview and publish once again.
If none of this helps, please provide your operating system and browser. Additionally please provide the content id of the affected CID. I can't guarantee things posted here will be looked at before Christmas, but I will do my best to take a look at your projects and see if I can pinpoint the issue. Unfortunately it does not seem to be widespread, which makes tracking it down more difficult.