The fast/encoding/utf-16-big-endian-diffs.html test fails, the pixel results no longer match. It looks like the border between the cells are not collapsing.
Created attachment 9286 [details] Actual
Created attachment 9287 [details] Expected
The new results are correct and match Firefox and Opera. Fixing bug 3297 fixed WebKit's rendering but updated pixel results weren't checked in. See item 2. in bug 9496 for a complete list.
Landed new results in revision 18408.