The site comes up with the wrong encoding.
Created attachment 12893 [details]
Narrowed it down to r19312-r19336. Likely suspects are <http://trac.webkit.org/projects/webkit/changeset/19324> and <http://trac.webkit.org/projects/webkit/changeset/19335>.
Created attachment 12894 [details]
Created attachment 12895 [details]
Mitz has suggested a cleaner approach.
Comment on attachment 12895 [details]
Please add a reference to the test to the WebCore change log.
Committed revision 19384.