Check it twice, find out whether your plug-ins are Naughty or Nice. Only days remain until WordPress 2.3 graces us with its presence. Due to some quite major changes in the database regarding categories and links, many plug-ins that directly accessed the database in the past will break. Some misbehave to the extent of crashing Apache on your web server. A big-time offender here is Extended Live Archives. While writing Breadcrumb Navigation XT 1.10.0, I spent some time testing various components of my blog in WP2.3. I also managed to update Berry to support tags (partially, as will be visible once WP 2.3 is out).
-John Havlik
[end of transmission, stay tuned]