Unexpected output for triplet width silence

[German Z]

Firs of all, congrats for your work guys!

That is my problem width the "swing eighth note":

For that input:

X:0
M:4/4
K:C
(3CzC

I expected the output shown in the pictures "spected1.jpg" or "spected2.jpg"  

but I've got the output "abc4jout.jpg" instead (notice that there's no triplet)

I figure out that this is just a "render problem" because when I play the score, it sounds right.
I also open a new issue in http://code.google.com/p/abc4j/issues/list (#25)

Is this an issue or I'm using it wrong?

Thanks a lot.