There is a bug where fonts get replaced incorrectly, which might be what you are seeing. It is already filed upstream and hopefully will be fixed for OOo 3.1. I can't reproduce the bug you are seeing in a simple case at least though. I have attached a sample screenshot, its not the exact same phrase since I can't easily enter those characters on my keyboard, I just cut and paste the title of your screenshot.
There is a bug where fonts get replaced incorrectly, which might be what you are seeing. It is already filed upstream and hopefully will be fixed for OOo 3.1. I can't reproduce the bug you are seeing in a simple case at least though. I have attached a sample screenshot, its not the exact same phrase since I can't easily enter those characters on my keyboard, I just cut and paste the title of your screenshot.
Chris