> NetBSD cappi 1.5.1_ALPHA NetBSD 1.5.1_ALPHA (CAPPI) #0: Sat Mar  3 08:46:23 CET 2001     zuntum@cappi:/usr/src/sys/arch/i386/compile/CAPPI i386
> 
> Have anyone seen that behaviour?

Yes (a long time ago) with a NetBSD native i386 binary.  I didn't
investigate; I just downloaded a FreeBSD binary and run that as a
workaround.

$ file /usr/local/bin/cvsup
/usr/local/bin/cvsup: FreeBSD/i386 compact demand paged executable
$ ls -l /usr/local/bin/cvsup
-rwxr-xr-x  1 giles  wheel  3674112 Jun 15  2000 /usr/local/bin/cvsup
$ cvsup -v
CVSup client, GUI version
Software version: REL_16_1
Protocol version: 16.1
http://www.polstra.com/projects/freeware/CVSup/
Report problems to cvsup-bugs@polstra.com

Regards,

Giles