DIV id's being stripped out …. any ideas?

We have users (administrators) that have pages that are breaking when they save them. It turns out that DIV ID’s are being stripped out when they save, this is happens in visual or html mode and whether or not they switch back and forth from visual to html, it occurs with the visual editor disabled as well. This also occurs with revisions, they are unable to restore older working versions of the page because those too will have the Div’s stripped out.

As a super admin this does not occur for me, but when I create a new administrator for an account I can reproduce the error, so it is clearly related to permissions, it does not affect super admins….

Has anyone else experienced this? Anyone have any ideas?

Any feedback appreciated!