Martijn,

First off the search function works wonders. Alas since i bothered to type this already I might as well answer your question.

If you have installed anything from extras devel repo, you will probably need to uninstall them before you can install the update OTA. This is because some of these packages conflict with the update. This particular problem was also prevelant with the last update.

Start with IOquake or Openarena if you have them installed. Might be the only thing you need to uninstall.

Install the update and then reinstall them.

2d