Casey, if you've upgraded the kernel and have been able to reboot, you're more than likely good to go

The main issues I've seen reported on the latest kernel releases have involved very specific hardware setups, most noteably the dual xeons offered at RackShack. Perhaps sexy-guy is referring to something of which is not common(or my limited) knowledge but per the link that Mike posted as well as numerous other resources available, 2.4.18-27.7.x is exploitable...it's a good bet that when RedHat says it's time to move on, that's who you should be listening to most

For sanities sake, though, just don't remove the previous kernel until you are comfortable with your current one.
Steve
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