Rails - Jun 2006 - script/console and IRB readline failure

Long input lines are confusing the readline on my script/console and irb
sessions.  I hit
back-arrow and suddenly the cursor goes up to the next line.  Thereafter the
previous-line
fails to work, giving me just an ampersand (&) instead of the previous line
to re-edit.
 
WinXP SP2.
 
 
Warren  Fred
 
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