Is due to the 2.4.3 console drivers.  They block interrupts during
console output.  There's a fix in 2.4.2-ac<recent>.
There's also a patch against 2.4.3-pre6 at
	http://www.uow.edu.au/~andrewm/linux/console.html
If you'd care to test the 2.4.3-pre6 patch for a while, that'd
be useful.
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