Wrong title font when uploaded from Aperture

I have discovered that some Norwegian letters, Æ, Ø and Å, are shown in another font when I upload photos from the Share menu in Aperture. The title font in my galleries should be a very nice, thin typeface, but æ, ø and å are shown in another, thicker font. I can replace the letters when editing the text directly in the browser, and then they look right, but it should be unnecessary to do. Is it perhaps a little bug in the Aperture plug-in?