Comment 40 for bug 475889

Created attachment 347200
Confused gtk font selector in LANG=C locale

Still present in Fedora 11.
I think the problem might be related to localised names of the narrow font. With LANG=C shown above, the errors are different. Font selection will yield the following (from the top): 4 times narrow, normal, italic, bold and bold italic. Narrow italic, narrow bold and narrow bold italic are still MIA. It's a little improvement over pl_PL locale, but far from a working solution nontheless.