something wrong with 2-cells

[juan_gandhi]

I've upgraded presheaf to render 2-cells, like this:

A \rtwocell^f_g{\alpha} &B



The problem is, dvipng does not render the down arrow properly.
I wonder if anybody knows anything or if anybody cares.

Comments

[nivanych.livejournal.com]

What's wrong with this 2-arrow?

[akuklev.livejournal.com]

А на второй день индеец Зоркий Глаз заметил, что и у горизонтальных стрелок отсутствуют наконечники.

[migmit.livejournal.com]

pdflatex + ImageMagick?