[Centos] new kernels

I just got done running and installing the new kernels for U4 a 
day or two ago.  I run yum update and now there is a .1 version 
of the same kernel available.  What got changed?

-- 
My "Foundation" verse:
Isa 54:17  No weapon that is formed against thee shall prosper; 
and every tongue that shall rise against thee in judgment thou 
shalt condemn. This is the heritage of the servants of the LORD, 
and their righteousness is of me, saith the LORD.

-- carpe ductum -- "Grab the tape"
CDTT (Certified Duct Tape Technician)