Is formatting errors in opening Office documents in non-Office formats. This is code level translation problems - it comes from trying to reverse engineer a closed format into an open source application, and I don't see any fix for it.
We don't experience these issues going from one version of Office to another. We see it when we try to go from any version of Office to a non-Office alternative.
I mean, there were some bumps going to Office 2010 with .___x files, and that delayed adoption for us... but eventually, it just starts to occur in an organic manner with Office and now the majority of Office users are on 2010 and we don't need to worry about backwards compatibility as much. That doesn't sort itself out the same way with the FOSS alternatives - for whatever reason.
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