The responses below are very dated and are maintained as historical
documents only.  Any such problems in current (DR2.1 or newer)
systems should be immediately reported to the appropriate
mailing list, as the problem that caused this has been fixed for
some time.

David

You're probably using an AppleDesign keyboard. Try a different keyboard
for now.

This can happen intermittently with some other keyboards, too. In that
case, just live with it.

If this happens on a NuBus Mac, you can also drop back to a version of
the Mach Kernel from before the PCI update.

jonh@cs.dartmouth.edu

New! Try updating the Mach Kernel to the latest one found
at ftp://ftp.mklinux.apple.com/pub/wip/
(The most recent kernel there is Mach_Kernel.970114)

New! Mach_Kernel.970114 does not work with AppleDesign keyboards!
No need to download it. (mar@ssc.se)

No, wait, New! Try ftp://ftp.mklinux.apple.com/pub/wip/Mach_Kernel.970117.
Nick Stephen thinks he's nailed this thing now. jonh

No, better yet! Even newer !There's a new update out which contains
the 970114 WIP Fix. Visit ftp://ftp.mklinux.apple.com/pub/Updates/970129.mklinux
lion@apple.com