See this test case for example: data:text/html;charset=utf-8,<span>%D8%B3</span><span>%D8%B3</span> The rendering should be the same as: data:text/html;charset=utf-8,%D8%B3%D8%B3
See also bug 6148.
Status should be changed to RESOLVED/DUPLICATES(6148).
*** This bug has been marked as a duplicate of bug 6148 ***