The thumb/preview image is missing mandatory "alt" attribute required by XHTML 1.0 Transitional specification thus the page is invalid

http://test.wikipedia.org/wiki/User:Danny_B./Bugs/Ogg_Handler_alt

http://validator.w3.org/check?verbose=1&ss=1&uri=http%3A%2F%2Ftest.wikipedia.org%2Fwiki%2FUser%3ADanny_B.%2FBugs%2FOgg_Handler_alt

http://www.w3.org/TR/xhtml1/dtds.html#dtdentry_xhtml1-transitional.dtd_img

Version: unspecified
Severity: normal