What is the problem with CVS when sometimes the binary corrupt?

[walala]

Dear all,

I have a .fig file which should be treated as binary. 

Our group has set the option in the wrapperfiles to treat this kind of
".fig" file to be "binary"... We have stored this wrapperfile in the
CVSROOT.

I have also specifically used the following command to mark it to be
binary:

cvs admin -kb [filename]

After all of this,

We downloaded it to Windows using Tortoise, and also downloaded in
Linux using "cvs checkout" command in Linux.

Both file is corrupted. 

The orginal size of the file, as appeared in the repository, is 130K
bytes.

The downloaded version, on Windows, it is 3535 bytes; on Linux, it is
3532 bytes, both are wrong. So the file is corrupted on both
platforms.

Anybody know why? Please help us! Thank you very much!

-Michael.