Comment 3 for bug 562996

I was working on a revision of a book > 1000 pages, with literally dozen of thousands of corrections with mainly tracked changes. This was so large and so slow even with shown changes that it was unmanageble even after just few pages so I had to split the book in parts of 30-50 pages. But this is expected behaviour so it does not matter.

Previously I have only used "track changes" a couple of times in rather small ammounts (<20 changes per document) and have seen no problems at all.

The point is that it is a huge effort and I have seen it only a couple of times so I don't know if I am going to be able to reproduce it, and I am bound by a legal agreement so I cannot share the document where it happened.

The text was a plain text with not intentional usage of styles and formatting, no pictures and only occasional tables. But, I think that the last time this happed was when making correction within a table, adding lines, deleting lines, going to the text editing the text outside the table and then undo and I think that the undo did not undo the changes to the table, just to the main text. I cannot even recall correctly now because after my first report I have gone thru 400 pages and I didn't have similar problem.