validate html5 issue

tried to validate document and got error message that looks like it's 
internal to the validator

"Sorry! This document cannot be checked."
External Checker not available

Checking the Document Type of this document requires the help of an 
external tool which was either not enabled in this validator, or is 
currently unavailable. Check in the validator's system configuration 
that HTML5 Validator is enabled and functional.

The error encountered was: |:11: parser error : Premature end of data in 
tag dl line 11 to continue. Sorry. The admin was 
notified.</message></non-document-error></dd> ^ :11: parser error : 
Premature end of data in tag elaboration line 11 to continue. Sorry. The 
admin was notified.</message></non-document-error></dd> ^ :11: parser 
error : Premature end of data in tag error line 8 to continue. Sorry. 
The admin was notified.</message></non-document-error></dd> ^ :11: 
parser error : Premature end of data in tag messages line 2 to continue. 
Sorry. The admin was notified.</message></non-document-error></dd> ^
|

|
To reproduce, simply try validate by direct input:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>broke</title>
</head>
<body>

<form>
<input type="image" 
src="http://www.blogger.com/img/add/add2blogger_sm_b.gif" />
</form>

</body>
</html>
|

|The missing alt on the input triggers this error, if you put an alt on 
that it goes through
|

Received on Friday, 15 June 2012 08:24:55 UTC