If you do
ps -ewf > tempfile
then the output from ps should go into tempfile. After doing the above command, do 'cat tempfile' and see if you get the same output as from the ps command.
If that still dosnt work, try doing the same thing in a different type of terminal, ie aterm instead of xterm, or even tty1 (get there by going ctrl+alt+F1) too see if that makes a difference.
give a much nicer display