Further to other fun and games with the Arch KDE SC 4.4 upgrade I hit upon a problem tonight with a virtual box I use that has the following repository in the /etc/pacman.conf file :
Server = http://dimon.homeftp.org/repo/i686
This is the repository that I use at present for KDevelop4. It seems there was a clash with certain files.
In order to get KDE SC 4.4 to upgrade I found I had to resort to pacman -Syuf which got it working.