tidy version 1st March 2004 .. making </span> after discarding </input> and discarding original </span>

after some "automatic" conversion steps failing to insert a xhtml 
doctype I've got the following "error in warning handling" situation 
using tidy
(tidy is in fact detecting a xhtml source, and therefore even the 
correction seems to be unnecessary:
 with  given doctype like in the comment, no warning is produced)

<span ><input ..></input></span>
when discarding the </input>, a </span> will be inserted,
and then the original </span> will be discarded after a warning message 
("discarding unexpected </span>")

(see simplified html source file)