This happened at the end of todays update from rawhide:
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<snip>
Completing update for kudzu-devel - 579/579
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
[root@old1 ~]#
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Richard Hally