A few days ago I did the 2.0.6 upgrade. I see today that the Jerome's Keyword plugin (the latest version, the 2.0beta3) doesn't quite work. My tag cloud is created. The options on the post page to create tags are there. But clicking on the tags anywhere (in the post, in the cloud, from the tag admin page) all are 404.
Since I can't go back in time, I can not prove what was working when. I use the 404 notifier plugin and it seems to confirm my suspicion.
I see from the comments at Jerome's site that at least one other person has had a similar problem after the upgrade.
Can anyone help? I just reuploaded the changed files to be sure they were the latest and no difference.