afni.nimh.nih.gov

Okay, here's the deal. Use this command:

to3d -4swap -time:zt 5 200 1500 alt+z 3Di:0:0:64:128:1000:name_of_sequence

The problem is that there is an internal conversion messing with the "byte swap"
option on the to3d gui. It should only affect people who, like you, have data with
4-byte integers.

I tested it today on a Sun, once I found out that's what you had. I saw
exactly what you reported, and the above solution worked.