It seems like there is a problem with the postJam 003 (and 002 Jam) linux version. It cannot locate the libXcursor.so.1 library ( Screenshot)
FIXED : For those having the problem. Think about installing the 32 bits version of the library (eg : apt-get install libxcursor1:i386 )
PS : Using Debian 8.3 jessie + Gnome