[CentOS] Yum still won't behave.

Before I reported that YUM often crashed. I was given help here on this 
list which stopped YUM from freezing my computer.

However, YUM is still not behaving.

Recently, I went to install a program called transcode. Yum found 14 
packages that needed to be installed. It installed one of them and then 
stopped.
It gave me this error:
/sbin/ldconfig: File /usr/lib/libk3bdevice.so.2.0.0.#prelink#.X8kEMh is 
empty, not checked.

So, I went to /etc/sysconfig/prelink and set PRELINKING=no, because I 
was told that this would stop that error message from coming up.

I went back to YUM to isntall the application, it found the remaining 13 
packages to install, got as far as installing one, then the same error 
message came up and it stopped again. I rechecked that I had properly 
edted the prelink file, and tried again.

This time, it found the remaining 12 files to install, gave no error 
message, but nonetheless it stopped after installing one package.

And so on. Eventually to install the application I had to run YUM 14 
times to get all 14 packages.

What could be wrong with my isntallation of YUM?

Dave