I have been struggling with this issue for some time.

As I am typing an email in Outlook (HTML on) the fonts will change mid-sentence sometimes. Sometimes it is just the font size, sometimes it is a completely different typeface.

I do not have any font management application running (i.e., Suitcase) so I don't know what would be affecting this. I also trying clearing out and pref files to no avail.

Thanks.

OS Mavericks 10.9.2

Outlook 14.4.1

MacBook Pro 15 2.6 GHz Core i7