Upgrade failure from WordPress 2.2.1 to 2.6

Tweet I thought why not upgrade the WordPress since I was a lot of versions behind. I first looked at the different steps that are required to upgrade to the new version. Just four steps:

1. Delete your old WP files, saving ones you've modified.
2. Upload the new files.
3. Point your browser to /wp-admin/upgrade.php.
4. You wanted more, perhaps? That's it!

Yes just four steps. You didn't even need to make a backup first it seams. I'm glad I did make a backup, specially of the database. So which are the troubles I had to overcome. The white page I just went to the blog's homepage, but saw nothing, yes just nothing. The management interface did work though. So when I went to the Design section I found out the theme doesn't work anymore. Not only this, it was also removed from the blog. Very strange, so I selected the WordPress default theme to have at least something online. The categories I though a not supported theme, that can happen. But when looking at the default page I saw a list of empty categories, yes empty categories only the amount of posts in each category was shown. This did make me feel a little bit angry, where are categories gone to? After some Googling I found out people who have the same people including this by hand solution. Beside the missing of the category names also the hierarchy is lost. I didn't fix the hierarchy because my new theme doesn't support hierarchical categories. The theme transition Because the failure of my old theme I got looking into a new one. So goodbye Connections Reloaded. Welcome Dreamplace.