I have upgraded to Mavericks ... also Pages 5.0 ... I am prepping my year end documents and when opening the docs, notice that I have to UPGRADE the document to work with this version. Once in, I see there are many features that are broken. For me, the connected text boxes are the most disturbing problem. I wanted to open the doc with Pages 4, but that is not possible. The file has been changed. I went into Time Capsule to find the older version so that I could restore it and open it with the older version of Pages, but it's been deleted from history .... really? ... my documents have been destroyed, and the history wiped out. This is why I switced from Windows. Deep breath ... is there some help out there?
I just tested something that may be useful to people in this situation.
If you've mistakenly saved over an existing file in Pages 5 and can no longer open it in Pages '09, and you don't want to export it back out to '09 with missing features, try the following...
Open it in Pages 5 and go to File > Revert to > Browse all versions...
Use the time machine interface to restore the version before you opened in Pages 5.
Close the document.
I then successfully opened the same document in Pages '09. Previously it had failed to open.
Perhaps people who have lost documents can try this method and confirm whether it works. Good luck, everyone.