I'm running 10.04 and i'm still only on v12 even though we've just had v14 pushed out by Google and on 3 Sept a big update to v13 that revoked the Diginotar certificates. I was running a ppa at one point but I can't remember when. Even so this state of affairs hazardous.
Unfortunately, the last 2 Chromium updates I tried to push out failed verification (bug 819991 and bug 834922). Recently, the person who was "maintaining" Chromium in Ubuntu also left the project. I plan on uploading Chromium 14 as soon as possible.