mathed bug displaying \lefteqn

[Angus Leeming]

(This is with LyX 1.3)

Create an eqnarray environment and then type on the top row
        \lefteqn{w+x+y+z = }

It gets typeset correctly by LaTeX, but is drawn strangely by LyX.
-- 
Angus

<<attachment: lefteqn.png>>