Wikimedia Bugzilla is closed!

1.5.5 will not install if you select a different language where the namespace is 
customized, for example with LanguageSv.php or LanguageRu.php.  I tried to install again 
using 1.5.4 with same settings and it installs fine.

[Fri Jan  6 12:59:09 2006] [error] PHP Fatal error:  Cannot redeclare class namespace in 
/mediawiki-1.5.5/includes/Namespace.php on line 52

MediaWiki 1.5.5 installation

Please include all of the lines below when reporting installation problems.
Checking environment...
PHP 5.0.3: ok
PHP server API is apache; ok, using pretty URLs (index.php/Page_Title)
Have XML / Latin1-UTF-8 conversion support.
PHP is configured with no memory_limit.
Have zlib support; enabling output compression.
Neither Turck MMCache nor eAccelerator are installed, can't use object caching functions
GNU diff3 not found.
Found GD graphics library built-in, image thumbnailing will be enabled if you enable 
uploads.
Installation directory: /testwiki
Script URI path: 
Warning: $wgSecretKey key is insecure, generated with mt_rand(). Consider changing it 
manually.

Fatal error: Cannot redeclare class namespace in /mediawiki-1.5.5/includes/Namespace.php 
on line 52