From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040312

Description of problem:
If I have multiple kernels installed:
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$ rpm -qa | grep kernel
kernel-utils-2.4-9.1.123
kernel-2.6.3-2.1.253
kernel-2.6.3-2.1.246
kernel-2.6.2-1.81.perfctr2.6.5
kernel-2.6.3-2.1.242.jreiser
kernel-2.6.3-2.1.253.jreiser
kernel-2.6.3-2.1.246.jreiser
kernel-2.6.3-2.1.242
$ 
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then up2date GUI believes that I'm behind the times:
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  [newest] Version 2.6.3-2.1.253  Old Version 2.6.2-1.81.perfctr2.6.5
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even though I do have the latest installed, and in fact am running it:
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$ cat /proc/version
Linux version 2.6.3-2.1.253.jreiser (jreiser@fc2test1) (gcc version
3.3.3 20040216 (Red Hat Linux 3.3.3-2.1)) #1 Sat Mar 13 17:50:49 PST 2004
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Version-Release number of selected component (if applicable):
up2date-gnome-4.3.11-2.1.1

How reproducible:
Always

Steps to Reproduce:
1. Install multiple kernel versions.
2. Click on red '!' rhn-applet in panel, Forward to "confirm skip of
kernels" window, look at Available/Old versions.
3.
    

Actual Results:  It seems like the oldest installed kernel is the one
that is picked for comparison with the newest available kernel.

Expected Results:  The newest installed kernel should be compared with
the newest available kernel.

Additional info: