I’ve now been through the process of upgrading to WordPress 2.5 and can say that the look and feel at the back-end is much improved. The upgrade itself is relatively straightforward, the only gotcha is if you are running K2 at the time of the upgrade. If so have a look at my post at http://forum.kjowebservices.co.uk/viewtopic.php?f=7&t=9 for help if it’s gone wrong when running K2.