A critical error while validating https://www.djangoproject.com/ with Unicorn

While validating https://www.djangoproject.com/ with Unicorn
(e.g. via http://validator.w3.org/unicorn/check?ucn_uri=https%3A%2F%2Fwww.djangoproject.com%2F&ucn_task=conformance )
I got the following message:
A critical error has occurred. Below is a stack trace from Unicorn, please copy and submit in a bug report to help us solve the problem.

So, I'm sending the bug report.

The copy-pasted stack trace:

class org.apache.xmlbeans.XmlException
error: Unexpected character encountered (lex state 3): 'v'
org.apache.xmlbeans.impl.store.Locale$SaxLoader.load(Locale.java:3486)
org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1276)
org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1263)
org.apache.xmlbeans.impl.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:345)
org.w3.x2009.x10.unicorn.observationresponse.ObservationresponseDocument$Factory.parse(Unknown Source)
org.w3c.unicorn.response.impl.DefaultResponseXBeans.<init>(DefaultResponseXBeans.java:60)
sun.reflect.GeneratedConstructorAccessor16.newInstance(Unknown Source)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.lang.reflect.Constructor.newInstance(Constructor.java:526)
org.w3c.unicorn.response.ResponseFactory.getResponse(ResponseFactory.java:24)
org.w3c.unicorn.request.URIRequest.doRequest(URIRequest.java:141)
org.w3c.unicorn.RequestThread.run(RequestThread.java:66)

My system is FreeBSD with Opera as a brawser, 'uname -a' produces the following.
FreeBSD vovaasus 9.3-STABLE FreeBSD 9.3-STABLE #40 r276468M: Wed Dec 31 17:44:54 EET 2014     root@vovaasus:/usr/obj/usr/src/sys/VOVA  amd64

Best regards,
Vladimir

-- 
Vladimir Chukharev

Received on Thursday, 15 January 2015 07:58:58 UTC