If you do manual upgrades and are using the Chromium Nightly (or daily) builds, you should probably not upgrade. The last 2 nightlies released contain issues with broken HTML5 video. Not only do they no longer support any codecs, the entire video tag doesn't work. This can be confirmed by visiting YouTube with the HTML5 beta active, by visiting my HTML5 Video Gallery, or by visiting the HTML5 Test.
