<hr /><i>mistachkin added on 2012-11-11 03:28:58 UTC:</i><br />
This can be bypassed by setting the "binary-glob" setting to include the necessary file types, either using the versioned setting file (i.e. and checking it into the repository itself, see "http://www.fossil-scm.org/xfer/doc/trunk/www/settings.wiki") or via the admin settings interface.