Primarily because of the WordPress plugins that I use, a few inconsistencies have leaped out of the woodwork that needed to be fixed. Here are the issues that I encountered:
Database errors appearing in web pages
This was a momentary discovery along the upgrade trail, entirely caused by the way in which I was doing things. As usual, I went and copied over the WordPress 2.3 files to my web server so I saw these errors before I ran the upgrade script. Then, they were banished, confirming that WordPress 2.3 code was trying to access a WordPress 2.2 type database; 2.3 has made some database changes in order to incorporate tagging.
Dashboard Editor no longer fully functional
The move to JQuery meant that some of the things for which its was looking had changed. They also changed the incoming links provider from Technorati to Google, now that the former is having a tougher time of it. It took a while to track down why I was unable to remove components from the front page of my dashboard as before but a quick comparison of 2.3 code with its 2.2.3 forbear revealed all. I can make a copy of the updated code available for those who need it.
WordPress Admin Themer
The plugin works as before and does its job so well that you end up applying an old stylesheet (in the blog’s theme folder) to the latest release. It only took a spot of tweaking to put everything in order.
I am not complaining about any of these, partly because they were easy to resolve and, in any event, I don’t mind a spot of code cutting. However, I can foresee some users being put out by them, hence my sharing my experiences.
Update: Dashboard Editor has since been updated by the author. Even so, I will stick with my own version of the plugin.