Segmentation Fault after upgrade 1.9

Hi Guys,

I've just upgraded to 1.9.1p243.

Everything in installation is fine EXCEPT it CANNOT RUN.

I downloaded the source and then ./configure --prefix=... sudo make sudo make install (then reboot)

And when I run "ruby -v" Segmentation Fault

My OS is ubuntu 9.1. Can anyone gimme some clue?

thanks Arthur