We have seen cases were excel files and word files don't read correctly. We have seen where an excel file is not properly read and large portions of the file are unavailable in the diff viewer. We ...
Currently, I have a review of a word doc with 6 versions uploaded. After one upload, the markers move to a different section of the doc and stay there for later versions. The doc has had a number of smaller changes, but nothing significant in the areas where the markers are wrong, except whitespace. The markers after that seem to be OK, too.