Formatting is restricted in Word 2007 but not in Word 2010

[Word2007User]

I have a document that has formatting restrictions (e.g., no highlighting of text) applied when opened in Word 2007 but not when opened in Word 2010 (on a different user's computer). In 2007, choosing the Developer ribbon and clicking Protect Document shows the following permissions in the right panel: "This document is protected from unintentional editing. You may freely edit in this region. You may format text only with certain styles." In 2010, choosing the Developer ribbon and clicking Restrict Editing shows that no restrictions are applied. I need to be able to work on the document in Word 2007 and be able to highlight text. Any suggestions?