does cvs reduce size of executables?

[Neelay Thaker]

Hi all,
I have a working tethereal executable. When I try to add it to the cvs
repository, it's size gets reduced as shown below. I even tried
removing the current tethereal and then adding it again, but when I
execute a "cvs commit" the size of the tethereal executable gets
reduced-
address@hidden tethereal]$ ls -l tethereal
-rwxr-xr-x  1 neelay wheel 33277880 Jun 30 14:10 tethereal
address@hidden tethereal]$ cvs add tethereal
cvs add: scheduling file `tethereal' for addition on branch
`THIRDPARTY'
cvs add: use 'cvs commit' to add this file permanently
address@hidden tethereal]$ ls -l tethereal
-rwxr-xr-x  1 neelay wheel 33277880 Jun 30 14:10 tethereal
address@hidden tethereal]$ cvs commit tethereal
** INFO ** commit not subject to validation
RCS file: /usr/cvs/tethereal/Attic/tethereal,v
done
Checking in tethereal;
/usr/cvs/tethereal/Attic/tethereal,v  <--  tethereal
new revision: 1.1.2.1; previous revision: 1.1
done
address@hidden tethereal]$ ls -l tethereal
-rwxr-xr-x  1 neelay wheel 33277672 Jun 30 14:11 tethereal
As seen above, the size of tethereal goes down from 33277880 to
33277672 after I did a cvs commit.
Any idea why this happens? This causes the new tethereal to exit on
"Segmentation Fault".

Thanks,
Neelay.