I wouldn't say up-graded, but WordPress 2.5 is definitely different. I feel the need to punish myself thusly, since wordpress is now my day job, besides my 'hobby' of supporting the themes I've developed. I've been playing with the SVN upgrades for a month or so now, ...
If you run a wordpress blog, you should be reading Blogsecurity. This is the feed I use, that only includes the wordpress advisories. I think it's a damn shame that this feed isn't included in the wordpress planet that's syndicated across everyone's dashboard. Security is ...