CentOS 5 :: Can't Login In KDE 3.5.4 With LDAP / Enable This?

We use Centos 5.3 which we deploy to dozens of boxes in different buildings throughout our shop. I set up KDE to be the default windows manager for these boxes, although the individual users can choose for themselves. We use LDAP authentication, and typically logging in through the LDAP into KDE goes without a hitch. However, a couple users are having problems logging in to their accounts through KDE, my boss and my boss's boss to be specific. We have NFS shares which serve up each users home directory regardless of where they connect in our system. When my boss, or his boss, try to log in, they put in their credentials, and LDAP accepts them, but KDE never starts. The splash screen which displays that it's "initializing system services" or "loading desktop" doesn't even come up, it just has a picture of the desktop with a cursor, and hangs there. I've tried deleting the .kde directories in their home folders, but that doesn't work. Those two are the only accounts out of our entire system that have problems logging in to KDE, and I have no idea why!
I've looked in the .xsession-errors file, here's a copy code...

I know it isn't the xset or "no profile" errors because all the users I've checked get those too, but they can log in just fine. Both xsession files on both users are almost identical to this one, it just seems that KDE will never start.