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I did some tests and it works for me on my own site.
Can you provide some infos about your setup, e.g. your LocalSettings.php?

(In reply to comment #1)
> Can you provide some infos about your setup, e.g. your LocalSettings.php?

<?php

# This file was automatically generated by the MediaWiki installer.
# If you make manual changes, please keep track in case you need to
# recreate them later.

$IP = "C:\\BigApache\\www\\wiki";
ini_set( "include_path", ".;$IP;$IP/includes;$IP/languages" );
require_once( "DefaultSettings.php" );

# If PHP's memory limit is very low, some operations may fail.
# ini_set( 'memory_limit', '20M' );

if ( $wgCommandLineMode ) {
	if ( isset( $_SERVER ) && array_key_exists( 'REQUEST_METHOD', $_SERVER ) ) {
		die( "This script must be run from the command line\n" );
	}
} else {
	## Compress output if the browser supports it
	if( !ini_get( 'zlib.output_compression' ) ) @ob_start( 'ob_gzhandler' );
}

$wgSitename         = "Politehmustdie";

$wgScriptPath	    = "/wiki";
$wgScript           = "$wgScriptPath/index.php";
$wgRedirectScript   = "$wgScriptPath/redirect.php";

## If using PHP as a CGI module, use the ugly URLs
# $wgArticlePath      = "$wgScript/$1";
$wgArticlePath      = "$wgScript?title=$1";

$wgStylePath        = "$wgScriptPath/stylesheets";
$wgStyleDirectory   = "$IP/stylesheets";
$wgLogo             = "$wgStylePath/images/wiki.png";

$wgUploadPath       = "$wgScriptPath/images";
$wgUploadDirectory  = "$IP/images";

$wgEmergencyContact = "123@123";
$wgPasswordSender	= "123@123";

$wgDBserver         = "localhost";
$wgDBname           = "wikidb";
$wgDBuser           = "wikiuser";
$wgDBpassword       = "wikidb";

## To allow SQL queries through the wiki's Special:Askaql page,
## uncomment the next lines. THIS IS VERY INSECURE. If you want
## to allow semipublic read-only SQL access for your sysops,
## you should define a MySQL user with limited privileges.
## See MySQL docs: http://www.mysql.com/doc/en/GRANT.html
#
# $wgAllowSysopQueries = true;
# $wgDBsqluser        = "sqluser";
# $wgDBsqlpassword    = "sqlpass";

$wgDBmysql4 = $wgEnablePersistentLC = true;

## To enable image uploads, make sure the 'images' directory
## is writable, then uncomment this:
# $wgDisableUploads		= false;
$wgUseImageResize		= true;
# $wgUseImageMagick = true;
# $wgImageMagickConvertCommand = "/usr/bin/convert";

## If you have the appropriate support software installed
## you can enable inline LaTeX equations:
# $wgUseTeX			= true;
$wgMathPath         = "{$wgUploadPath}/math";
$wgMathDirectory    = "{$wgUploadDirectory}/math";
$wgTmpDirectory     = "{$wgUploadDirectory}/tmp";

$wgLocalInterwiki   = $wgSitename;

$wgLanguageCode = "ru";
$wgUseLatin1 = false;


$wgProxyKey = "5c8fe892303706fb68a3ce7b6bc28486963a72056e2ee658fe23745a277501";

## Default skin: you can change the default skin. Use the internal symbolic
## names, ie 'standard', 'nostalgia', 'cologneblue', 'monobook':
# $wgDefaultSkin = 'monobook';

## For attaching licensing metadata to pages, and displaying an
## appropriate copyright notice / icon. GNU Free Documentation
## License and Creative Commons licenses are supported so far.
# $wgEnableCreativeCommonsRdf = true;
$wgRightsPage = ""; # Set to the title of a wiki page that describes your
license/copyright
$wgRightsUrl = "";
$wgRightsText = "";
$wgRightsIcon = "";
# $wgRightsCode = ""; # Not yet used

?>

May be I can define domain adress by me self ? where I can do it ?

You can set $wgServer in your LocalSettings.php to http://limp.iceberg-m.ru:81/
If this doesn't help you'll have to check your apache settings for other
redirects or rewrites.