different format in NEdit and GVIM

[Belinda Zeng]

 
Hi, all,
  I am using both NEdit and VIM, and set the tab spacing for both
editors to 3. However, if I edit a file using NEdit, which looks fine
under NEdit, then open with GVIM, I am seeing all tabs become 8
characters.
  Wondering if anyone has seen the same behavior? Is this a NEdit
problem or a VIM problem?
thank you very much!
Belinda