1.After installing Mandriva 2011 read the Errata - http://wiki.mandriva.com/en/2011.0_Errata
Familiarise yourself with some of the known bugs, it isnt necessary to run every fix listed in the errata and I cannot tell you what to run as my system is totally different to yours :-)
However, the unused locales / drivers will apply.
2. Remove the unused locales and drivers left behind by the installer
Open a terminal and run these commands as root
3. Speed up KDE by disabling the debugging.
Why was KDE debugging turned on by default is beyond me, distributions such as Fedora KDE, Kubuntu, Mageia have this disabled. When enabled there is a performance hit.
To disable it, run this command as your normal regular user.
And tick the box to disable all debugging.
4. Update Mandriva
Open the Mandriva Control Center, select configure media sources for install and update.
Click on Add, then choose "Full set of sources"
You are now ready to update Mandriva, go back to the Control Center and select the "Update your system" option. If you get a prompt asking to resolve a dependency, please select the following option,
The update should run smoothly after this.
5. Reboot and enjoy Mandriva 2011!
Well almost, if closing Firefox causes LibreOffice to launch, remove the sym link in /usr/lib64/mozilla/plugins/libnpsoplugin.so