Upgrading Mandriva to Cooker

I was needing some fresher system libraries and since the release of the next stable Mandriva Linux will be in just a few days, switching to Cooker (the development branch of Mandriva) was the easier option.
Here are the steps to switch Mandriva Linux to Cooker, taken from the Mandriva wiki:

1. First, remove media for the stable release : urpmi.removemedia -a
2. Add the required media for Cooker : urpmi.addmedia --distrib --mirrorlist 'http://api.mandriva.com/mirrors/basic.cooker.$ARCH.list'
3. Update all installed packages : urpmi --auto-update

I had to repeat the 3rd step several times, partly due to lagging mirrors. 

So far, I haven't noticed a bug, it seems 2010.1 will be one of the best releases ever.