This takes the cake. Alex Brown has just admitted on his Griffin Brown blog and further to ZDNET UK's Peter Judge that Microsoft Office 2007 has failed two OOXML conformance tests he ran. First ZDNET:
In a blog posting this week, Alex Brown, revealed that Microsoft Office 2007 documents do not meet the latest specifications of the ISO OOXML draft standard.

I’ve mentioned before that whatever happens with the JTC1 ballot that closes on September 2, there will be a lengthy process that follows it before OOXML ever becomes an ISO/IEC standard, if that does come to pass.

The ODFalliance.org now has a new OOXML Resource Section. Bellow you will find the complete text from “OOXML Implementations: A Community of One”. If anything, the ODF Alliance analysis is too charitable. OOXML is NOT CLOSE TO a community of one. Documents produced by Microsoft Office 2007 are not OOXML (Ecma 376), DIS 29500, or even DIS 29500 as amended at the BRM.

At a Red Hat retrospective panel on the ODF vs. OOXML struggle panel, a Microsoft representative, Stuart McKee, admitted that ODF had 'clearly won.' The Redmond company is going to add native support of ODF 1.1 with its Office 2007 service pack 2. Its yet unpublished format ISO OOXML will not be supported before the release of the next Office generation.

Microsoft's Office Open XML (OOXML) document format, which was technically approved in April as an international standard (ISO/IEC 29500), may be on its way toward surviving an appeals process -- the last challenge to its legitimacy as a standard.

On September 2, the comment and voting period will close on ISO/IEC DIS 29500, the draft specification based upon Microsoft's Office Open XML formats (OOXML). The Linux Foundation (LF) has received questions from outside its membership regarding its position on adoption of OOXML in its current form as a global standard, and on the adoption process itself.

lso in Italy we are discussing if the Office Open XML format (the XML format which replicates the working of MS Office 2007) is to be approved as an ISO standard (ISO/IEC DIS 29500), with a "fast track" procedure. For several reasons this would seem unacceptable. Many are indeed the unanswered questions on the standard.

Within the next 24-hours, Microsoft will submit to JTC1 a set of proposals for addressing the 3,522 comments that accompanied OOXML's failed ballot last September. We'll no doubt hear a lot of yip-yip-yahooing on their end. Expect a major media campaign. I don't want to take away the surprise, but I'm hearing that journalists are being flown into Redmond next week from around the world for briefings on OOXML. So, for their benefit, and yours, let's review where we are in the JTC1 process.

Following criticism from the Open Source Industry Association (OSIA) over its ambition to have the Office Open XML (Open XML or OOXML) format accepted as an international (ISO) standard, Microsoft's group product manager for Microsoft Office, Gray Knowlton, spoke with Computerworld about why the world needs two standard document formats.