Broken by Firefox update? (Drupal 6 + Wysiwyg)

Hi,

We're using CKEditor 3.6.1.7072 with Drupal 6 and the Wysiwyg module (both Drupal 6 & module are at the latest stable version).

I'm not sure when this happened, but it still worked sometime last week and the problem was first noticed this morning. Nothing has changed on the server side code since the last update to the above components.

What happens: When adding a new node or editing an existing one with an input format that activates CKEditor, the editor appears and you can edit seemingly as normal. When you hit "save" or "preview", all the new content is lost and the node still contains what it did when you first opened the edit page (so nothing for a new node and the old content when editing an existing node).

This only occurs when an input format that uses CKEditor is selected. All other input formats allow saving and previewing normally. The problem occurs in Firefox 6 on both Windows and Linux but Chrome is unaffected. I tried emptying the cache of both the browser and the Drupal performance cache but it did not change anything.

Has anyone else noticed the same problem? Is there a fix I can implement?

Thanks.