Is everyone else's datafeed really still working?

I changed some settings (made identifier model instead of ID, etc) and it still says the XML is bad.

XML tag mismatch

Your data feed contains a pair of opening/closing XML tags that don't match. A closing tag must always match the most recent opening tag in the feed. For example, this XML would generate an "XML Tag Mismatch" error:

<g:event_dateTime>
<g:from>2005-12-20T14:00:00
<g:to>2005-12-20T19:00:00</g:to>
</g:event_dateTime>
The XML generates an error because the attribute tag <g:from> doesn't have a matching end-tag </g:from>. Each attribute tag must be terminated by the matching end-tag:

<g:event_dateTime>
<g:from>2005-12-20T14:00:00</g:from>
<g:to>2005-12-20T19:00:00</g:to>
</g:event_dateTime>
The item containing this error will be skipped.