Synfig crashes consistently

I cannot figure out why my Synfig Studio crashes consistently with one particular project of mine. In terminal it says:

7fa357e9d000-7fa357e9e000 rw-p 00024000 08:05 1842291 /usr/lib/x86_64-linux-gnu/
7fa357eb1000-7fa357fe9000 r-xp 00000000 08:05 655748 /opt/synfig/lib/
7fa357fe9000-7fa3580e8000 —p 00138000 08:05 655748 /opt/synfig/lib/
7fa3580e8000-7fa3580f4000 rw-p 00137000 08:05 655748 /opt/synfig/lib/
7fa3580f4000-7fa358195000 r-xp 00000000 08:05 655743 /opt/synfig/lib/

Does anyone know what is happening?

Send please some more informations start with something like
Cite carbonphobia in viewtopic.php?f=15&t=3411
synfig 63.04
ubuntu 10.10
64bit version

and maybe more output form the terminal,
the particular project file who crash synfig,
the context who crash synfig : what fonction you click, parameter you choose, the order you do the things … in short, how to (try to) reproduce the call of the bug,
and others bidulle you want to share.