DraftSight Installation

Bonjour,
I use Ubuntu 12.04/32 bits on Acer portable (Intel® Core™ i5 RAM 4Go.
After a release (from v1R3.2 to v1R4), I have to use a term with "sudo draftsight" on command line.
If I use the DraftSight icon launcher : nothing !
With only "draftsight" on command line : Segmentation fault (core dumped)
I had test 3 installs way (command line, GDebi and Loditheque Ubuntu) but the trouble is alive !!
Thank you for any idea