Editing with Internet Explorer - Change made, but not put in history

• Edit a page with I.E.
• Save the change
• The change is visible in the page
• Edit the page
• The change you made isn't there!
• Switch to Firefox - you see the change when you view the page
• edit that page
• The change isn't there!
• Look at history
• The change isn't there!

I have tried different cache settings, including "check for newer versions of page on every visit to a page", so that does not appear to be the case.

Clearly, the xwiki gets the change, because it diplays it on the page, but it isn't putting it in its history.

I called it critical b/c as much as I hate IE, xwiki does have to work with it and this is pretty fundamental.