yeah, if any field on the form has changed, it will post that message.
Like I said, if I change all the controls to post back "always", it won't, because the latest data for each control will have already posted back. But this is VERY slow.
I also tried to create a hidden control, and set that to postback always, and have a pre-submit rule change the contents to hopefully have it submit all the form data and avoid the message, but that didn't seem to work.
I'm at a loss as to why it would do that on this form in particular, and not others I've done.