Hrm, the built-in PDF viewing must not be on the Ubuntu PPA (Didn't see an option for it anywhere either)
Also, I'm not sure how the bookmark sync works. I set it up on one instance of Chrome, then on my other computer, it over-rides the first instance, removing some and merging others. I don't really know what it did, but it seemed kind of inconsistent. But of course, I was using a daily
I think it happens when you manually update it on browser, after adding few bookmarks. Let the sync take care of it. It happened to me couple of time, now it works fine. Syncing among Windows,Linux and OSX dev channel.
Also, I'm not sure how the bookmark sync works. I set it up on one instance of Chrome, then on my other computer, it over-rides the first instance, removing some and merging others. I don't really know what it did, but it seemed kind of inconsistent. But of course, I was using a daily