audio is repeating after stop

hi all,
I'm using kdenlive 0.9.2 in kde 4.8.5 (release 2 / Suse 12.2), having this fenomen:

I start in 0:00 with space, stop at 2:30, then start a second time with space, hearing the voice from 1:00 in 4:00.
In other words, video starts correctly, audio starts from beginning.

Maybe, this is new since last update. Can you help me, please?

Roland