User Sees Different Things in Dashboard on Different Computers

[wistex]

I found a really weird situation. Here's what happened:

An author logged into his WordPress account on the blog's Administrator's computer. The Administrator logged out, and the Author logged in using the same computer. The Author writes an article, saves it as a draft, logs out, and then later logs into WordPress on a different computer.

There were some issues:

1. The Author could not see the post he created on the other computer, even though he was logged in as himself and the article is attributed to him in WordPress as the author.
2. The Author could see only their own posts in WordPress on their own computer, but when logged in as the Author on the Admin's computer, the Author could see all the posts.
3. The computers were placed side by side, and the Author logged into both computers with the Author's username, and it was confirmed that the list of articles showing the the Dashboard in the Posts section were different.

So it appears that one user's session is bleeding into the next user's session. And an Author can only see a post on the computer he wrote it on, if it is not published yet.

[wistex]

Seems the issue was Firefox. It was caching everything, even the admin pages, and was not updating, even after clearing the cache. What is weird is that other websites were not caching the same way in Firefox on that computer. Opening the same site in Chrome on that computer solved the problem. So it appears to be an issue with Firefox, not WordPress. At least at this time.