CKEditor fails to load after page reload on Firefox

I have noticed a similar issue. Sometimes after refreshing, the editor GUI loads but I can't click in the editor to type. Any data I attempt to load data through setData doesn't appear. Refreshing again sometimes fixes it, sometimes it doesn't. Clicking the "source" button and then switching back makes the editor usable again.

I initially thought it was a caching issue but I have my cache disabled with Web Developer Toolbar. I can also sometimes get it to occur in IE8, and having multiple editors on a page seems to increase the frequency of this issue.

To reproduce the issue:
- Go to the CKEditor Demo page here
- Do a hard refresh (Ctrl+F5) for good measure
- hit F5 multiple times until it fails
- sometimes it happens immediately and sometimes it takes a while
- You'll know it has failed when the demo data doesn't appear
- clicking "source" and then clicking back makes the editor usable again

Note: That isn't how I originally encountered the issue...just how to duplicate what I usually see when the issue occurs. As I said I have multiple editors on the page, and I believe it's causing the issue to occur more frequently.

I have exactly the same issue as described below: The editor does not load with data and you cannot type in the editor. F5 og Ctrl-F5 does not solve the issue.

It occurs when using Firefox 3.6.3 with CKeditor 3.2.1. It works fine in Internet Explorer 8 and Chrome.

I didn't have the issue with FCKeditor 2.6

/Erik

Problem solved: After testing, I discovered that the issue wasn't with Firefox itself, but with the add-on, Tab Mix Plus. Disabling Tab Mix Plus in Firefox solved the problem and enabled CKeditor without failures.