i've seen that a few times, that nul character is CHAR(0), and a great example of why you need a little better text editor; plain old windows notepad won't show you that kind of issue.
i've typically done a find and replace of those chars to fix the files themselves before i import them.
should those NUL values be treated as commas? spaces? maybe go back to teh source and tell em it's nto a good format?
Lowell