It seems that during the big SVN conversion some data were lost in commits.
So, if you check KDE's svn for the really old stuff, it has no author information.
For example, check this out:
I know I wrote pretty much everything there, but you are probably not going to notice it, and I spent a good couple of years working really hard on that thing.
Sure, it was crap, but it was hard-worked crap, and there is at least one thing I am slightly not ashamed of: TypeLayout, which is still nicer than most toolkits have, even if it was shamlessly copied from LinuxConf.
But what the heck, it's old stuff.