We believe that your issue has been closed by the upload of
Version 0.3.90 of grml-etc-core from Christian Hofstaedtler <ch@grml.org>.
The explanation is attached below

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Format: 1.8
Date: Thu, 26 May 2011 21:24:25 +0200
Source: grml-etc-core
Binary: grml-etc-core
Architecture: source all
Version: 0.3.90
Distribution: unstable
Urgency: low
Maintainer: Michael Prokop <mika@grml.org>
Changed-By: Christian Hofstaedtler <ch@grml.org>
Description: 
 grml-etc-core - core ecetera files for the grml system
Changes: 
 grml-etc-core (0.3.90) unstable; urgency=low
 .
   [ Frank Terbeck ]
   * [42cc9b0] Fix `lsold' globbing flags [Closes: issue991]
   * [e07e9a2] Use the same options in lnew as in lsnew
   * [748acc6] zshrc: vman: Handle zero arguments [Closes: issue993]
Checksums-Sha1: 
 9123152447433dedb7582c644f6dfcbc7bb55a04 1531 grml-etc-core_0.3.90.dsc
 463c03dc53951d92f29d0cc430fabeeeb3fe5dcc 1160649 grml-etc-core_0.3.90.tar.gz
 e45657674ce73cd78a6f5816f03a3cd9991a6339 156838 grml-etc-core_0.3.90_all.deb
Checksums-Sha256: 
 429627f1d50cd8667ddd6ce0b490ad20f1a06f10c11123dbac27a08307d650d6 1531 grml-etc-core_0.3.90.dsc
 59bbe5214cae9f770a701136bbd17dec2b1ef2df3afb94469bf46f119b941339 1160649 grml-etc-core_0.3.90.tar.gz
 fec9327119af61467208062f343e273d819b06c38b0abf6fa6fbe553fb5454d7 156838 grml-etc-core_0.3.90_all.deb
Files: 
 4b05ef4968e329fb30555daa6594d22b 1531 grml optional grml-etc-core_0.3.90.dsc
 84f7f2ca292c42c6d0c1b9a4bf538bc5 1160649 grml optional grml-etc-core_0.3.90.tar.gz
 a66e4d2307f23591673e75014cb50d90 156838 grml optional grml-etc-core_0.3.90_all.deb

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)

iQIcBAEBCAAGBQJN3qlRAAoJEL7IfitBhWKaKKAQAKVJh6zTMeNPPmK2MqL5MmE6
5Se9bMbGrJeAIPVb0x4B0gVW5+dzZf3mDAr+fzUWmys9UfDUTBZyoPpRI2wUFjym
GUMozfrp4LKmSDaxbASUTGxcQ79kUE2AKSiMaSocEZMvbwGvS5GC8A58Tdey79wN
N6HIIf+OGAiy8M4KSJJridm7YqJCMKy3mh9NsFr0XYTzIo3sN/PjvJQxEP/48Msq
dXIJ93HIAVcZdAGxkysjfQ1mniIGcxPbGK9gkkNBXpTgTumvS8bpBm9kwB12wHbv
7o8Bqvfwgkc8QfUEBPqNlqSYCMHKZUpu267UEzchFxs46T9SdLBod2caZ/6gU72S
x80+hj0ZsZdvobOqYXAl7ElnHE/+AG9VLO7wLvFuOn6MpZ86GyE7WnYo2h83aoP3
tNPIMCFpZIWS32O3FPT4FJPWY6NUARHdzESFRn6CS7Et6z4iaezYtvoUy6MDoySq
20FeHeouOXxXmeBTN2ifVaC4a47OMqkvx84OYf3tR7++ome842XHuckwLLFB8xFd
s/V1ItfsD/8Eb88ckLImFAyAIBD9tJVCvyj/HsFz6g0h5YdScy87oLOaiWFWuWzW
08fDm1oYsn+d3Y0tsRDKEUEYz8QzJhXApnp4qGJdPrMIdPxYp1umWGyWhGPdd0e2
gfdMZBALw4tDgWgXLUHq
=er9O
-----END PGP SIGNATURE-----

The vman function should provide an error message if no argument is provided 
(like man does) and not launch view with no content.