`top` reports all CPU states as 0% on i386

This box is a fairly fresh install of 5.2-RC2, running on Pentium
200MMX. The line from top reads as follows:

CPU states:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  0.0% idle

I first noticed it when my cacti/rrdtool snmp graphs for CPU usage
showed 0 across the board.

This afternoon I cvsup'd it to -CURRENT and rebuild kernel and world.
After rebooting the problem remained.

Is this a known problem?

-T


-- 
"'Way back, I set myself to be a happy man, and made it."
	- Louis Armstrong