Here are screen captures of the Find and Replace dialogs in Word 2003, 2010 and Office 365 when CTRL+i is used to invoke the format criteria.



I have the Complex scripts section in the Font dialog of all of the above versions. I may be there because at one time or another, I have had various Middle Eastern, Asian languages installed (i.e. non-Latin text). Do you have the Right-to-left and Left-to-right
text direction facilities in the Paragraph dialog or on the ribbon
Note, if the Format facility in the Find and Replace dialog is used to set the format criteria, and you have the Complex scripts section in the Font dialog, it is possible to set the criteria to either Font: Italic or Complex Script Font: Italic, or to both.
If it is set to both, (which is what is done when the CTRL shortcut is used), it will of course only find text to which BOTH of the formats have been applied.
A bit more testing reveals that if you use the Italic button in the Font section of the ribbon or invoke one of the built-in styles that are formatted as italic, both the Font: Italic and Complex Scripts Font: Italic attributes are applied to the text.
On the other hand, if you use the Font dialog to assign Italic font, using just the Font style dropdown in the Latin text section of the Font dialog, only that one attribute will be applied to the text.
