yum error on Kernel install

[Naoki]

Kernel Updated/Installed, checking for bootloader
Traceback (most recent call last):
  File "/usr/bin/yum", line 30, in ?

  File "/usr/share/yum/yummain.py", line 375, in main

  File "/usr/share/yum/pkgaction.py", line 588, in kernelupdate
ImportError: No module named checkbootloader


Any ideas?