We have a 100+ page user guide that was marked up with many comments. All of these were mapped correctly. Upon introducing 6 new pages (3 spreads) early in the document all of the comments are now mapped 3 spreads out of sync. Removing the 3 spreads did not resolve the issue and now our comments are all mapped to the wrong pages. This is strange as I really would imaging that comments are mapped to specific object ID's rather than a 'physical location'.