YASQ: ksh in 2.4 has forgotten about history

[Jay "you ignorant splut!" Maynard]

After I installed 2.4, ksh forgot that it knows about history files -
but only on root's login. ^P (I use the emacs version) just rings the
bell, even if previous commands exist. /history exists and is writable,
but is empty. Everything works fine on my normal user login.

I've obviously forgotten something stupid; what is it?

-- 
Jay Maynard, EMT-P, K5ZC, PP-ASEL   | Never ascribe to malice that which can
uucp:        uunet!nuchat!   (eieio)| adequately be explained by stupidity.
    hoptoad!academ!uhnix1!splut!jay +----------------------------------------
{killer,bellcore}!texbell!          | "Less great!" "Tastes filling!"