innocent_white_lamb writes "An interesting discussion has surfaced on the Scribus mailing list. Simply stated, it appears that using GPL-licensed fonts in a document makes your document subject to the GPL. There are a lot of consequences here, such as internal corporate communications. It appears to make the use of GPL fonts undesirable in almost any document."
Yes, it sounds crazy, but the experimental font-exception addition
to the GPL (linked from the discussion) lends the idea some credence.