I decided I shouldn't ignore the blinky exclamation point any more, and fired up up2grade. It upgraded the kernel to 2.4.18-27.8.0, among other things, and I rebooted...
...only to get a kernel panic, complaining about not being able to mount the root fs.
If I choose to boot from the previous kernel, 2.4.18-26.8.0, all is well.
The plot thickens: I can also boot from 2.4.18-27.8.0debug. Same LABEL= , same root (hd0,1), and so forth in grub.conf. So...what's special about 2.4.18-27.8.0?
James Jones
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