rendering suddenly goes to 100% after first title clip

Hy,
(excuse for my poor and not good english)
i always used kdenlive (great video editor) whitout problem in ubuntu 11.04 but now i installed (from ubuntu software center) and use kdenlive (0.82.1) under Ubuntu 12.04 (64bit and kernel release 3.2.0-24-generic) and i encounter always this problem: if i start rendering (any format) it suddenly goes 100% as soon as meet the first title clip!
if in timeline there aren't any title clips the rendering work fine.

how is it possible to solve this poblem?

thanks
corrado