Pencil2D crashs on Ubuntu

Hi guys, finally got time to try Pencil2D 0.5.4 (pencil2d_0.5.4-20130728.1_i386.deb) but it keep closing after i do pretty much anything and after a create a new key, Pencil auto selects the cursor tool, can you guys guide me up on this one?

Ubuntu 12.04 32bits

here’s the debug window: