Problem saving documents edited in visio in sharepoint 2010

SharePoint and Office 365 : How to ??

When the users open a visio document (from a sharepoint 2010 library), make changes and try to save they get this error…

Unable to get value of the property ‘eDocument’: object is null or undefined
URL: http://ourserver/_layouts/1033/bform.js
Do you want to continue running scripts on this page.

I have googled and found posts that suggest overwriting/adding js code from previous SP versions to this file in 2010 but I’m not sure that is a good idea.

When the doc properties are viewed there is missing mandatory data that was previously there before they tried to edit/save the document.

Somehow something is removing mandatory metadata and the getting itself confused.

This is not specific to a single document or library – it is consistent across the site collection

No other office docs have this problem.
Visio is set to open in the client application

Any help will be appreciated
Thank you

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