We're evaluating the Rich Text Editor for our customer admin portal.  We require CMS content templates where only specified areas are editable.  The noneditable tags sound great on paper, but we're finding several issues with this feature.  Here is what we've found:

• If we arrow key up/down from an editable area to a read-only area, we can edit text in the read-only area.
• If we completely select a read-only area, we can delete it.
• At various times, we can mouse-click a read-only area and edit the content.