libjpeg causes crash

Hi, I have an ibook G3 800MHz 750fx (32 VRAM - Late 2002 - Translucent White).

I have a problem with some graphic applications (i.e zathura, xombrero,
netsurf), each of which goes in crash and a core dump file is saved in
my home.

Now, the core dump debugging tell me that the cause is libjpeg (for each
of them):

Program received signal SIGILL, Illegal instruction.
jsimd_idct_islow_altivec () from /usr/local/lib/libjpeg.so.68.1

I use awesome WM, sometimes it also goes in crash also with the same
problem, libjpeg.

--
"Information wants to be Free"