After upgrading my box to centos5.3 I started seeing an error
There are unfinished transactions remaining. You might consider running yum-complete-transaction
first to finish them
On trying to run yum-complete-transaction the cmd was unrecognized. . Solution: Install yum-utils, drop down to root environment (su -) and run the cmd yum-complete-transaction, it should run and fix your yum problem
.