Hmmm...I've noticed that if you open the Pages '09 document from Evernote and save any revisions, they aren't reflected in Evernote nor when you reopen the document in Pages. The workaround doesn't work. Sorry for the misinformation.
I'm glad that this bug is being addressed. I'm using a workaround: Export the .pages document as a Pages '09 document (File > Export to > Pages '09). It allows us the same functionality as before, but my only gripe is that the formatting looks very odd when viewed in Evernote. When you open the same file in the new Pages, however, the correct formatting is intact.