URLs in href attributes that contain non-ASCII characters in the host part (such as needed for IDN) are not parsed correctly. Steps to reproduce: Open the URL and click the link (or watch the Safari Status Bar text when hovering over the link). Most likely caused by the KURL changes, <http://trac.webkit.org/projects/webkit/changeset/30243>.
<rdar://problem/5781091>
Fixed in <http://trac.webkit.org/projects/webkit/changeset/30781>.