Created attachment 71691 [details]
When you open a file. Odt MS 2 error messages appear.
Created attachment 71692 [details]
And why do you think that that is a LibO problem and not a MSO problem??
I think it's a compatibility issue that can be solved in LO even if the message appears when using MS.
Depends on the developers if this message appears every time you open a file and users will find that there is no compatibility between the two applications.
If you save with LO. of .odt format in .docx format and open it with MS earlier message no longer appears. So, I believe that the problem can be solved from the LO.
if you save your file as ODF 1.0/1.1 you get no error message, and the content is displayed correctly. MS Office 2007 doesn't support ODF 1.2.
Otherwise you get the message, but you can open the file nevertheless (if you installed MS Office 2007 SP2 or SP3). So it is not an LibreOffice bug (if it is a bug at all).
But MS Office 2010? I worked with MS Office 2010.
I understand your concern, and I agree about what users can think about this issue.
The problem is that we can't change what M$Office has decide to correctly read and what it want to reject instead.
Also Word is proprietary software, so we don't know why that message is displayed (are them trying to read a correct file the wrong way?).
If word would work in the right way, you should complain with M$ that their import filter is broken and/or does not implement ODF 1.2.
The only "fix" LiBo could do were if you could demonstrate that we save the file contrary to the Open Document Format specifications, that is not the case. You can only demonstrate that some version of M$Office is broken with some version of ODF.
An interesting info could maybe be if a file like the attached saved with LiBo 3.6.x as .odt is correctly read and the same file, with the same format, saved with LiBo 4.0 is not.
MS Office 2010 doesn't support ODF 1.2 either. MS Office 2013 is said to support ODF 1.2, but LibO 4.0 supports "ODF 1.2 extended" as default and you probably would have to select "ODF 1.2" to avoid error messages from Word 2013.
NOTOURBUG due to discussion results.